1/6Men gather at a site hit by what activists said was a barrel bomb dropped by forces loyal to President Bashar al-Assad, in al-Qarlaq, Aleppo, May 29, 2014.
The Syrian Observatory for Human Rights says government air raids have killed nearly 2,000 civilians this year in and around Aleppo, the country's largest city.
2/6Rescue workers, rebel fighters and civilians search for survivors at a site hit by what activists said was a barrel bomb dropped by forces loyal to President Bashar al-Assad, al-Qarlaq, Aleppo, May 29, 2014.
The Syrian Observatory for Human Rights says government air raids have killed nearly 2,000 civilians this year in and around Aleppo, the country's largest city.
3/6Rescue workers, rebel fighters and civilians search for survivors at a site hit by what activists said was a barrel bomb dropped by forces loyal to President Bashar al-Assad, al-Qarlaq, Aleppo, May 29, 2014.
The Syrian Observatory for Human Rights says government air raids have killed nearly 2,000 civilians this year in and around Aleppo, the country's largest city.
4/6A man holds a wounded child in a building hit by what activists said was a barrel bomb dropped by forces loyal to President Bashar al-Assad, Bustan al-Qasr, Aleppo, May 28, 2014.
The Syrian Observatory for Human Rights says government air raids have killed nearly 2,000 civilians this year in and around Aleppo, the country's largest city.
5/6A man carries his belongings as he walks among debris from a collapsed buildings hit by what activists said was a barrel bomb dropped by forces loyal to President Bashar al-Assad, Bustan al-Qasr, Aleppo, May 28, 2014.
The Syrian Observatory for Human Rights says government air raids have killed nearly 2,000 civilians this year in and around Aleppo, the country's largest city.
6/6People stand near damaged buildings hit by what activists said was a barrel bomb dropped by forces loyal to President Bashar al-Assad, Bustan al-Qasr, Aleppo, May 28, 2014.
The Syrian Observatory for Human Rights says government air raids have killed nearly 2,000 civilians this year in and around Aleppo, the country's largest city.
