A Lebanon's Hezbollah supporter holds a photograph of leader Sayyed Hassan Nasrallah during his address via a video screen during a ceremony of the latest day of Ashoura in Beirut, Lebanon September 30, 2017. Picture taken September 30, 2017. REUTERS/Khalil Hasan 

Lebanon's Hezbollah supporters hold photographs of leader Sayyed Hassan Nasrallah during his address via a video screen during a ceremony of the latest day of Ashoura in Beirut, Lebanon September 30, 2017. Picture taken September 30, 2017. REUTERS/Khalil Hasan 

A Lebanon's Hezbollah supporter holds a photograph of leader Sayyed Hassan Nasrallah during his address via a video screen during a ceremony of the latest day of Ashoura in Beirut, Lebanon September 30, 2017. Picture taken September 30, 2017. REUTERS/Khalil Hasan 

Lebanon's Hezbollah leader Sayyed Hassan Nasrallah is seen on a video screen as he addresses his supporters during a ceremony of the latest day of Ashoura in Beirut, Lebanon September 30, 2017. Picture taken September 30, 2017. REUTERS/Khalil Hasan 

REFILE - UPDATING CAPTION TO REUTERS STYLE A Kashmiri Shi'ite Muslim bleeds after he flagellated himself during a Muharram procession to mark Ashura in Srinagar October 12, 2016. REUTERS/Danish Ismail TPX IMAGES OF THE DAY

Shi'ite Muslims perform with fire during commemorations for Ashoura in Najaf, October 9, 2016. REUTERS/Alaa Al-Marjani

Shi'ite Muslims perform with fire during commemorations for Ashoura in Najaf, October 9, 2016. REUTERS/Alaa Al-Marjani TPX IMAGES OF THE DAY

Shi'ite Muslims perform with fire during commemorations for Ashoura in Najaf, October 9, 2016. REUTERS/Alaa Al-Marjani

Shi'ite Muslims perform with fire during commemorations for Ashoura in Najaf, October 9, 2016. REUTERS/Alaa Al-Marjani

Shi'ite Muslims perform with fire during commemorations for Ashoura in Najaf, October 9, 2016. REUTERS/Alaa Al-Marjani

Shi'ite Muslims perform with fire during commemorations for Ashoura in Najaf, October 9, 2016. REUTERS/Alaa Al-Marjani

Shi'ite Muslims perform with fire during commemorations for Ashoura in Najaf, October 9, 2016. REUTERS/Alaa Al-Marjani

A man performs with fire during a Muharram procession to mark Ashura in Ahmedabad, India, October 24, 2015. Ashura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Amit Dave TPX IMAGES OF THE DAY

Shi'ite Muslims mourn during a Muharram procession to mark Ashura in Delhi, India, October 24, 2015. Ashura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Anindito Mukherjee TPX IMAGES OF THE DAY

A Shi'ite Muslim boy shouts religious slogans after flagellating himself during a Muharram procession to mark Ashura in Srinagar, October 24, 2015. Ashura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Danish Ismail 

An Iraqi Shi'ite boy poses for a photograph as Iraq Shi'ite Muslims commemorate Ashura in Baghdad, October 24, 2015. Ashura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Ahmed Saad TPX IMAGES OF THE DAY

A Shi'ite Muslim walks on hot coals at a ceremony during the Ashura festival at a mosque in central Yangon October 21, 2015. Ashura is the most important day in the Shi'ite calendar, which commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century battle of Kerbala. REUTERS/Soe Zeya Tun TPX IMAGES OF THE DAY

An Afghan Shi'ite Muslim prays after flagellating himself during an Ashura procession in Kabul, Afghanistan October 20, 2015. Ashura, the biggest event of the Shi'ite Muslim calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century . REUTERS/Omar Sobhani REUTERS/Omar Sobhani 

Afghan Shi'ite Muslims gather for prayers after flagellating themselves during an Ashura procession in Kabul, Afghanistan October 20, 2015. Ashura, the biggest event of the Shi'ite Muslim calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century . REUTERS/Omar Sobhani

Afghan Shi'ite Muslims flagellate themselves during an Ashura procession in Kabul, Afghanistan October 20, 2015. Ashura, the biggest event of the Shi'ite Muslim calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century . REUTERS/Omar Sobhani

Afghan Shi'ite Muslims flagellate themselves during an Ashura procession in Kabul, Afghanistan October 20, 2015. Ashura, the biggest event of the Shi'ite Muslim calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century . REUTERS/Omar Sobhani TPX IMAGES OF THE DAY

An Afghan Shi'ite Muslim prays after flagellating himself during an Ashura procession in Kabul, Afghanistan October 20, 2015. Ashura, the biggest event of the Shi'ite Muslim calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century . REUTERS/Omar Sobhani REUTERS/Omar Sobhani 

People walk past police patrol vehicles parked at one of the main entrances leading to downtown Manama, Bahrain October 18, 2015. Bahrain has beefed up security around the capital and Shi'ite mosques to provide extra security during the Ashoura period. Ashoura, the most important day in the Shi'ite calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the seventh century battle of Kerbala. REUTERS/Hamad I Mohammed 

A man sits on a bench as police patrol vehicle is parked behind him at one of the main entrances leading to downtown Manama, Bahrain October 18, 2015. Bahrain has beefed up security around the capital and Shi'ite mosques to provide extra security during the Ashoura period. Ashoura, the most important day in the Shi'ite calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the seventh century battle of Kerbala. REUTERS/Hamad I Mohammed 

People walk past police patrol vehicles parked at one of the main entrances leading to downtown Manama, Bahrain October 18, 2015. Bahrain has beefed up security around the capital and Shi'ite mosques to provide extra security during the Ashoura period. Ashoura, the most important day in the Shi'ite calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the seventh century battle of Kerbala. REUTERS/Hamad I Mohammed 

A Hezbollah member drives a 4-wheel motorbike mounted with a mock rocket during a re-enactment of the battle of Kerbala during a mourning process, ahead of the day of Ashura, in Saksakieh village, southern Lebanon, October 18, 2015. Ashoura, the most important day in the Shi'ite calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century battle of Kerbala. REUTERS/Ali Hashisho

Muslim Shi'ite boys wearing military outfits take part in a march organised by Hezbollah during a re-enactment of the battle of Kerbala during a mourning process, ahead of the day of Ashura, in Saksakieh village, southern Lebanon, October 18, 2015. Ashoura, the most important day in the Shi'ite calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century battle of Kerbala. REUTERS/ Ali Hashisho

Muslim Shi'ite girls take part in a march organised by Hezbollah during a re-enactment of the battle of Kerbala during a mourning process, ahead of the day of Ashura, in Saksakieh village, southern Lebanon, October 18, 2015. Ashoura, the most important day in the Shi'ite calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century battle of Kerbala. REUTERS/Ali Hashisho

Muslim Shi'ite women carry a Hezbollah flag as they take part in a march organised by Hezbollah during a re-enactment of the battle of Kerbala during a mourning process, ahead of the day of Ashura, in Saksakieh village, southern Lebanon, October 18, 2015. Ashoura, the most important day in the Shi'ite calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century battle of Kerbala. REUTERS/Ali Hashisho

Muslim Shi'ite women and girls carry Hezbollah flags as they take part in a march organised by Hezbollah during a re-enactment of the battle of Kerbala during a mourning process, ahead of the day of Ashoura, in Saksakieh village, southern Lebanon, October 18, 2015. Ashoura, the most important day in the Shi'ite calendar, commemorates the death of Imam Hussein, grandson of the Prophet Mohammad, in the 7th century battle of Kerbala. REUTERS/Ali Hashisho TPX IMAGES OF THE DAY

Lebanese Hezbollah supporters march during a religious procession, to mark the burning of the tents that is part of Ashura religious ceremony, in Nabatieh November 7, 2014. REUTERS/Ali Hashisho (LEBANON - Tags: POLITICS RELIGION) 

A Lebanese Hezbollah supporter takes a picture using her mobile phone during a religious procession to mark the burning of the tents, that is part of the Ashura religious ceremony, in Nabatieh November 7, 2014. The picture on the back of the mobile phone shows Syria's President Bashar Al-Assad. REUTERS/Ali Hashisho (LEBANON - Tags: POLITICS RELIGION) 

Muslim Shi'ite women light candles to commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags: CIVIL UNREST POLITICS RELIGION) 

Children hold lit candles to commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags: CIVIL UNREST POLITICS RELIGION) 

A Muslim Shi'ite woman holds a lit candle to commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags - Tags: CIVIL UNREST POLITICS RELIGION) 

Iraqi Shi'ite Muslims commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags - Tags: CIVIL UNREST POLITICS RELIGION) 

Iraqi Shi'ite Muslims commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags - Tags: CIVIL UNREST POLITICS RELIGION) 

Iraqi Shi'ite Muslims commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags - Tags: CIVIL UNREST POLITICS RELIGION) 

Muslim Shi'ite women light candles to commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags: CIVIL UNREST POLITICS RELIGION) 

Iraqi Shi'ite Muslims light candles to commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags: CIVIL UNREST POLITICS RELIGION) 

Muslim Shi'ite women light candles to commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags - Tags: CIVIL UNREST POLITICS RELIGION) 

Iraqi Shi'ite Muslims commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. Ashoura commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. The signs read, "God avenge Hussein". REUTERS/Ahmed Saad (IRAQ - Tags: CIVIL UNREST POLITICS RELIGION) 

Iraqi Shi'ite Muslim commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags - Tags: CIVIL UNREST POLITICS RELIGION) 

Iraqi Shi'ite Muslims commemorate Ashoura in Kerbala, southwest of Baghdad November 4, 2014. A gathering of millions of Shi'ite Muslims at shrines and mosques across Iraq for the Ashoura religious commemoration passed without any major attacks on Tuesday, under tight security imposed for fear of Islamic State bombers. REUTERS/Ahmed Saad (IRAQ - Tags - Tags: CIVIL UNREST POLITICS RELIGION TPX IMAGES OF THE DAY) 

Shi'ite Muslims flagellate themselves during a Muharram procession marking Ashoura in Piraeus port town, near Athens November 4, 2014. Ashoura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Yorgos Karahalis (GREECE - Tags: RELIGION) 

Shi'ite Muslims flagellate themselves during a Muharram procession to mark Ashoura in Mumbai November 4, 2014. Ashoura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Danish Siddiqui (INDIA - Tags: RELIGION TPX IMAGES OF THE DAY) 

An Iraqi Shi'ite Muslim man uses a sword on a boy's head during Ashoura in Baghdad November 4, 2014. More than one million Shi'ite Muslims gathered at shrines and mosques across Iraq on Tuesday for the Ashoura religious ritual with Iraqi security forces on alert for any repeat of the attacks that have inflicted mass casualties during past pilgrimages. Security for the event has been tight since suspected al Qaeda suicide bombers and mortar attacks killed 171 people during Ashoura, an event that defines Shi'ism and its rift with Sunni Islam, in Kerbala and Baghdad in 2004. Shi'ites are commemorating the slaying of Prophet Mohammad's grandson Imam Hussein at the battle of Kerbala in AD 680. The words visible on the sword read, "Hussein." REUTERS/Thaier Al-Sudani (IRAQ - Tags: RELIGION TPX IMAGES OF THE DAY) 

An Iraqi Shi'ite Muslim hits his forehead with a sword as he commemorates Ashoura in Baghdad November 4, 2014. More than one million Shi'ite Muslims gathered at shrines and mosques across Iraq on Tuesday for the Ashoura religious ritual with Iraqi security forces on alert for any repeat of the attacks that have inflicted mass casualties during past pilgrimages. Security for the event has been tight since suspected al Qaeda suicide bombers and mortar attacks killed 171 people during Ashoura, an event that defines Shi'ism and its rift with Sunni Islam, in Kerbala and Baghdad in 2004. Shi'ites are commemorating the slaying of Prophet Mohammad's grandson Imam Hussein at the battle of Kerbala in AD 680. The words visible on the sword read, "Hussein." REUTERS/Thaier Al-Sudani (IRAQ - Tags: SOCIETY RELIGION) 

Shi'ite Houthi followers shout slogans as they attend a celebration marking Ashoura in Sanaa November 4, 2014. Ashoura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Khaled Abdullah (YEMEN - Tags: POLITICS RELIGION) 

An Iraqi Shi'ite Muslim man uses a sword on man's head as they commemorate Ashoura in Baghdad November 4, 2014. More than one million Shi'ite Muslims gathered at shrines and mosques across Iraq on Tuesday for the Ashoura religious ritual with Iraqi security forces on alert for any repeat of the attacks that have inflicted mass casualties during past pilgrimages. Security for the event has been tight since suspected al Qaeda suicide bombers and mortar attacks killed 171 people during Ashoura, an event that defines Shi'ism and its rift with Sunni Islam, in Kerbala and Baghdad in 2004. Shi'ites are commemorating the slaying of Prophet Mohammad's grandson Imam Hussein at the battle of Kerbala in AD 680. The words visible on the sword read, "Hussein." REUTERS/Thaier Al-Sudani (IRAQ - Tags: RELIGION) 

Shi'ite Houthi followers shout slogans as they attend a celebration marking Ashoura in Sanaa November 4, 2014. Ashoura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Khaled Abdullah (YEMEN - Tags: POLITICS RELIGION) 

Iraqi Shi'ite Muslim boys hold toy swords as they commemorate Ashoura in Baghdad November 4, 2014. More than one million Shi'ite Muslims gathered at shrines and mosques across Iraq on Tuesday for the Ashoura religious ritual with Iraqi security forces on alert for any repeat of the attacks that have inflicted mass casualties during past pilgrimages. Security for the event has been tight since suspected al Qaeda suicide bombers and mortar attacks killed 171 people during Ashoura, an event that defines Shi'ism and its rift with Sunni Islam, in Kerbala and Baghdad in 2004. Shi'ites are commemorating the slaying of Prophet Mohammad's grandson Imam Hussein at the battle of Kerbala in AD 680. The words visible on the sword read, "Hussein." REUTERS/Thaier Al-Sudani (IRAQ - Tags: RELIGION) 

Shi'ite Houthi followers shout slogans as they attend a celebration marking Ashoura in Sanaa November 4, 2014. Ashoura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Khaled Abdullah (YEMEN - Tags: POLITICS RELIGION) 

An Iraqi Shi'ite Muslim boy hits his forehead with a sword as he commemorates Ashoura in Baghdad November 4, 2014. More than one million Shi'ite Muslims gathered at shrines and mosques across Iraq on Tuesday for the Ashoura religious ritual with Iraqi security forces on alert for any repeat of the attacks that have inflicted mass casualties during past pilgrimages. Security for the event has been tight since suspected al Qaeda suicide bombers and mortar attacks killed 171 people during Ashoura, an event that defines Shi'ism and its rift with Sunni Islam, in Kerbala and Baghdad in 2004. Shi'ites are commemorating the slaying of Prophet Mohammad's grandson Imam Hussein at the battle of Kerbala in AD 680. The words visible on the sword read, "Hussein." REUTERS/Thaier Al-Sudani (IRAQ - Tags: RELIGION) 

Iraqi Shi'ite Muslims boys hit their foreheads with swords and beat themselves as they commemorate Ashoura in Baghdad, November 4, 2014. More than one million Shi'ite Muslims gathered at shrines and mosques across Iraq on Tuesday for the Ashoura religious ritual with Iraqi security forces on alert for any repeat of the attacks that have inflicted mass casualties during past pilgrimages. Security for the event has been tight since suspected al Qaeda suicide bombers and mortar attacks killed 171 people during Ashoura, an event that defines Shi'ism and its rift with Sunni Islam, in Kerbala and Baghdad in 2004. Shi'ites are commemorating the slaying of Prophet Mohammad's grandson Imam Hussein at the battle of Kerbala in AD 680. REUTERS/Thaier Al-Sudani (IRAQ - Tags: RELIGION) 

A Shi'ite Muslim flagellates himself during a Muharram procession to mark Ashoura in Mumbai November 4, 2014. Ashoura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Danish Siddiqui (INDIA - Tags: RELIGION) 

Shi'ite Muslims flagellate themselves during a Muharram procession to mark Ashoura in Mumbai November 4, 2014. Ashoura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Danish Siddiqui (INDIA - Tags: RELIGION) 

A Shi'ite Muslim man holds knives before flagellating himself during a procession to commemorate Ashoura in Rawalpindi November 4, 2014. Ashoura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Faisal Mahmood (PAKISTAN - Tags: RELIGION) 

A Shi'ite Muslim is sprayed with rose water as he flagellates himself during a Muharram procession to mark Ashoura in Mumbai November 4, 2014. Ashoura, which falls on the 10th day of the Islamic month of Muharram, commemorates the death of Imam Hussein, grandson of Prophet Mohammad, who was killed in the seventh century battle of Kerbala. REUTERS/Danish Siddiqui (INDIA - Tags: RELIGION)