A Free Syrian Army sniper sits in a shooting position in Old Aleppo June 7, 2014. REUTERS/Hamid Khatib (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY MILITARY) 

Children play near a bus barricading a street, which serves as protection from snipers loyal to Syria's President Bashar al-Assad, in Aleppo's rebel-controlled Bustan al-Qasr neighbourhood January 28, 2015. REUTERS/Abdalrhman Ismail (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY) 

Besieged residents pull a basket filled with food that activists provided to them in Ashrafieh, Aleppo September 17, 2013. Activists are helping residents of Ashrafieh in Aleppo who are unable to get out of their homes, fearing snipers, by providing them with food through baskets pulled by a rope. REUTERS/Muzaffar Salman (SYRIA - Tags: CIVIL UNREST POLITICS FOOD TPX IMAGES OF THE DAY CONFLICT) 

Free Syrian Army fighters peek through gaps at a concrete barrier as they watch their fellow fighters who where caught under sniper fire on the front line in Aleppo's Sheikh Saeed neighbourhood September 21, 2013. REUTERS/Molhem Barakat (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

A sheet covers a damaged road from snipers in Sheikh Maksoud, Aleppo September 26, 2013. REUTERS/Molhem Barakat (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

Free Syrian Army fighters rush to help their fellow fighter after he was shot by a sniper loyal to Syria's President Bashar al-Assad in Aleppo's Salaheddine neighbourhood October 9, 2013. REUTERS/Ammar Abdullah (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY) 

Free Syrian Army fighters walk along a curtain erected as protection from snipers loyal to Syria's President Bashar al-Assad in the Aleppo district of Salaheddine September 13, 2013. REUTERS/Muzaffar Salman (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

A woman reporter runs with a rebel fighter to avoid snipers at the frontline against the Islamic State fighters in Aleppo's northern countryside October 10, 2014. REUTERS/Jalal Al-Mamo (SYRIA - Tags: POLITICS CIVIL UNREST) 

Free Syrian Army fighters take cover from snipers by crawling on the front line in Aleppo's Sheikh Saeed neighbourhood September 21, 2013. REUTERS/Molhem Barakat (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY) 

A Free Syrian Army sniper sits in a shooting position behind sandbags in Old Aleppo June 7, 2014. REUTERS/Hamid Khatib (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

Free Syrian Army fighters take cover behind curtains erected along a damaged street as protection from snipers loyal to Syria's President Bashar al-Assad in Aleppo's neighbourhood of Salaheddine September 27, 2013. REUTERS/Malek Al Shemali (SYRIA - Tags: POLITICS CIVIL UNREST) 

A sniper loyal to Syrian President Bashar-Al-Assad is seen on a mirror at a window in old Aleppo, September 8, 2013. REUTERS/Molhem Barakat (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

A Free Syrian Army fighter carries his weapon as he stands near a dummy erected to distract snipers loyal to Syria's President Bashar al-Assad in Aleppo's Karm al-Jabal district November 21, 2013. REUTERS/Molhem Barakat (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

Free Syrian Army fighters run behind barriers fearing snipers in Sina'a neighbourhood in Deir al zor, eastern Syria October 5, 2013. Picture taken October 5, 2013. REUTERS/Khalil Ashawi (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

Civilians run as they flee shelling and sniper shots by forces loyal to Syria's President Bashar al-Assad during what activists said were heavy clashes between Free Syrian Army fighters and the regime's forces, in Sabaa Bahrat and Bab al-Nasr area in Aleppo April 27, 2014. REUTERS/Abdalrhman Ismail (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

Clothes used for cover from snipers is pictured in the besieged town of Arbeen in the eastern Ghouta of Damascus January 17, 2015. REUTERS/Yaseen Al-Bushy (SYRIA - Tags: CIVIL UNREST CONFLICT) 

A man walks as he bends his head to avoid snipers that belong to forces loyal to Syrian President Bashar al-Assad in Homs March 9, 2014 REUTERS/Thaer Al Khalidiya (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

A Free Syrian Army fighter uses a Syrian opposition flag to attract and locate snipers loyal to Syria's President Bashar al-Assad in Aleppo's Qastal al-Harami neighbourhood September 11, 2013. REUTERS/Nour Kelze (SYRIA - Tags: CIVIL UNREST CONFLICT) 

Civilians push a cart with a wounded man who was shot by whom activists said a sniper loyal to Syria's President Bashar al-Assad, at the Karaj al-Hajez crossing October 4, 2013. The Karaj al-Hajez crossing is a passageway separating Aleppo's Bustan al-Qasr, which is under the rebels' control, and Al-Masharqa neighbourhoods, an area controlled by the regime. REUTERS/Ammar Abdullah (SYRIA - Tags: CONFLICT CIVIL UNREST SOCIETY TPX IMAGES OF THE DAY) 

A boy fixes covers that were erected to provide protection from snipers loyal to Syria's President Bashar al-Assad in Aleppo's Aqyoul neighbourhood March 26, 2014. Picture taken March 26, 2014. REUTERS/Abdalrhman Ismail (SYRIA - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

Children run across a street to avoid snipers in Deir al-Zor, eastern Syria February 16, 2014. Picture taken February 16, 2014. REUTERS/Khalil Ashawi (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

Residents run fearing sniper fire in Tripoli, northern Lebanon, December 1, 2013.Three people were killed overnight in fighting in the north Lebanese city of Tripoli, security sources said on Sunday, raising to nine the death toll in 24 hours of violence fuelled by sectarian tensions over Syria's civil war.The clashes between Tripoli's Alawite minority, which supports Syria's Alawite President Bashar al-Assad, and majority Sunni Muslims who back the Syrian rebels, is the latest round of violence which has killed more than 100 people in the Mediterranean city this year. REUTERS/Omar Ibrahim (LEBANON - Tags: POLITICS CIVIL UNREST) 

People walk under curtains which are hung as protection from snipers loyal to Syria's President Bashar al-Assad, along a damaged street in the besieged area of Homs, January 1, 2014. Picture taken January 1, 2014. REUTERS/Yazan Homsy (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

A civilian runs to take cover from snipers loyal to Syria's President Bashar al-Assad stationed in Aleppo's historical citadel April 27, 2014. REUTERS/Abdalrhman Ismail (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY) 

An injured Free Syrian Army fighter reacts on the ground after being hit by a sniper on the front line in Aleppo's Sheikh Saeed neighbourhood September 21, 2013. REUTERS/Molhem Barakat (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

A rebel fighter works on an improvised sniper equipment inside a room where he is taking position at the Handarat frontline near Aleppo Central prison May 27, 2014. REUTERS/Hosam Katan (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

Rebel fighters walk past blinds erected as protection from snipers loyal to Syria's President Bashar al-Assad in Salaheddine neighborhood of Aleppo January 8, 2015. REUTERS/Hosam Katan (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH
A dog scavenges near a dead body along a deserted street in eastern al-Ghouta, near Damascus April 30, 2014. The body belongs to Samer El Habet, a mentally ill person who was shot by a sniper loyal to forces loyal to Syria's President Bashar al-Assad, after he wandered into the street, unaware of the danger, according to activists. Picture taken April 30, 2014. REUTERS/Ammar Al-Bushy ( SYRIA - Tags: ANIMALS CIVIL UNREST POLITICS CONFLICT)

TEMPLATE OUT 

An area controlled by forces loyal to Syria's President Bashar al-Assad is seen through a sniper's scope held for the photographer by a Free Syrian Army fighter in Aleppo's Al-Ezaa neighbourhood September 11, 2013. REUTERS/Aref Hretani (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)