Egyptian youth smoke shisha water-pipes outside a coffee shop in Cairo, Egypt February March 10, 2020. Picture taken March 10, 2020. REUTERS/Hanaa Habib

Young men sit in an empty cafe after a ban on smoking a water pipe (shisha), following the coronavirus outbreak, in Erbil, Iraq March 2, 2020. REUTERS/Azad Lashkari

People carry a coffin during a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People carry a coffin during a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People carry a coffin during a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People carry a coffin during a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People carry a coffin during a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People carry a coffin during a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

Serpil, mother of Ferhat Unvar, one of the victims after shisha bar shootings, mourns during his funeral service in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People attend a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People attend a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

A woman mourns during a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

Hanau's Mayor Claus Kaminsky attends a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People attend a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People attend a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People attend a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People attend a funeral service for one of the victims after shisha bar shootings in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

Mourners are reflected in a frame showing the pictures of the victims after shisha bar shootings, ahead of a funeral in Hanau, Germany, February 24, 2020. REUTERS/Kai Pfaffenbach

People attend a funeral service for one of the victims of the Hanau shisha bar shootings in Offenbach near Frankfurt, Germany, February 24, 2020. REUTERS/Alex Kraus

People attend a funeral service for one of the victims of the Hanau shisha bar shootings in Offenbach near Frankfurt, Germany, February 24, 2020. REUTERS/Alex Kraus ATTENTION EDITORS - ONLY TO BE USED FULL FORMAT, NO CROPPING ALLOWED

A poster depicting Bjoern Hoecke of Alternative for Germany (AfD) and reading "Never again" is pictured outside the Midnight Shisha bar in Hanau, near Frankfurt, Germany, February 22, 2020. REUTERS/Ralph Orlowski

Candles and flowers for the victims of the recent shooting are placed outside the Midnight Shisha bar in Hanau, near Frankfurt, Germany, February 22, 2020. REUTERS/Ralph Orlowski

Candles and flowers are seen placed outside the Midnight Shisha bar, for the victims of a shooting in Hanau, near Frankfurt, Germany, February 21, 2020. REUTERS/Kai Pfaffenbach

Hesse's State Minister of Interior Peter Beuth arrives at the Midnight Shisha bar, following a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Kai Pfaffenbach

Hesse's State Minister of Interior Peter Beuth arrives at the Midnight Shisha bar, following a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Kai Pfaffenbach

Hesse's State Minister of Interior Peter Beuth arrives at the Midnight Shisha bar, following a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Kai Pfaffenbach

Forensic investigators are seen outside the Midnight Shisha bar following a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Kai Pfaffenbach

A forensic investigator enters the Midnight Shisha bar following a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Kai Pfaffenbach

Forensic investigators enter the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

Flowers and candles are placed near the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

Forensic investigators enter the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

Police officers and forensic investigators are seen outside the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

A police officer walks outside the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

Flowers and candles are placed near the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

Flowers and candles are placed near the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

Police officers stand outside the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

Police officers stand outside the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

Police officers stand outside the Midnight Shisha bar after a shooting in Hanau, near Frankfurt, Germany, February 20, 2020. REUTERS/Ralph Orlowski

Forensic experts are seen outside a shisha bar after a shooting in Hanau near Frankfurt, Germany, February 20, 2020. REUTERS/Kai Pfaffenbach

Forensic experts are seen outside a shisha bar after a shooting in Hanau near Frankfurt, Germany, February 19, 2020. REUTERS/Kai Pfaffenbach

Protesters and militia fighters smoke a water pipe (shisha) in a tent during a protest to condemn air strikes on bases belonging to Hashd al-Shaabi (paramilitary forces), outside the U.S. Embassy in Baghdad, Iraq January 1, 2020. REUTERS/Thaier al-Sudani

Iraqi demonstrators smoke shisha as they burn tires to block a street during ongoing anti-government protests in Kerbala, Iraq December 23, 2019. REUTERS/Abdullah Dhiaa al-Deen

An Iraqi man smokes shisha during ongoing anti-government protests in Baghdad, Iraq December 20, 2019. REUTERS/Thaier al-Sudani

Iraqi demonstrators smoke water pipe (shisha) during ongoing anti-government protests in Baghdad, Iraq, December 8, 2019. REUTERS/Alaa al-Marjani

An Iraqi demonstrator smokes a water pipe (shisha) during an ongoing anti-government protests, in Baghdad, Iraq November 20, 2019. REUTERS/Khalid al-Mousily

A demonstrator carries a shisha pipe as he climbs up a ladder at the "Egg", an abandoned cinema building in Beirut, Lebanon, October 28, 2019. REUTERS/Alkis Konstantinidis SEARCH "LEBANON EGG" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A man smokes shisha at a restaurant in Hong Kong, China October 18, 2019. REUTERS/Ammar Awad

People smoke shisha at a restaurant in Hong Kong, China October 18, 2019. REUTERS/Ammar Awad

Palestinians smoke shisha on the beach in Gaza City July 2, 2019. Picture taken July 2, 2019. REUTERS/Mohammed Salem

Palestinians smoke shisha on the beach in Gaza City July 2, 2019. Picture taken July 2, 2019. REUTERS/Mohammed Salem

Iraqi men smoke water pipe (shisha) at a cafe in the holy Shi'ite city of Najaf, Iraq August 26, 2019. Picture taken August 26, 2019. REUTERS/Alaa al-Marjani

A Saudi man smokes shisha while watching a broadcast of Bundesliga highlights, pirated by beoutQ, at a local cafe in Khobar, Saudi Arabia, August 2, 2019. Picture taken August 2, 2019. REUTERS/Hamad I Mohammed

An Iraqi man smokes a water pipe (shisha) as another dives into the Euphrates river, to take a swim and cool off, during increased temperatures, in the holy city of Najaf, Iraq, June 13, 2019. Picture taken June 13, 2019. REUTERS/Alaa Al-Marjani

Iraqi men smoke a water pipe (shisha) at a cafe in Baghdad, Iraq April 9, 2019. Picture taken April 9, 2019. REUTERS/Khalid al-Mousily

Iraqi men smoke a water pipe (shisha) at a cafe in Baghdad, Iraq April 4, 2019. Picture taken April 4, 2019. REUTERS/Thaier al-Sudani

Iraqi men smoke a water pipe (shisha) and drink tea at Radio Cafe One Fm, where radio transmitting from a local cafeteria in Mosul, Iraq March 17, 2019. Picture taken March 17, 2019. REUTERS/Khalid al-Mousily

A man smokes shisha near a Marilyn Monroe image at El Fishawi Cafe in Cairo, Egypt December 23, 2018. REUTERS/Amr Abdallah Dalsh

A man smokes shisha near a Marilyn Monroe image at El Fishawi Cafe in Cairo, Egypt December 23, 2018. REUTERS/Amr Abdallah Dalsh