Turkish soldiers fire a missile at Syrian government position in the province of Idlib, Syria. Turkey, backer of Syria's opposition, has been deploying equipment and troops in the region, which is home to more than 3 million people, in an attempt to halt the Syrian military's advances.
This photo provided by the Syrian anti-government activist group Edlib Media Center, shows victims of a suspected chemical attack, in the town of Khan Sheikhoun, northern Idlib province, Syria.
This frame grab from video shows, a Syrian doctor treating a boy following a suspected chemical attack, in the town of Khan Sheikhoun, northern Idlib province, Syria.
A Syrian doctor treating a child following a suspected chemical attack, at a makeshift hospital, in the town of Khan Sheikhoun, northern Idlib province, Syria.
This frame grab from video shows, a victim of a suspected chemical attack as he receives treatment at a makeshift hospital, in the town of Khan Sheikhoun, northern Idlib province, Syria.
A Syrian doctor treating a boy following a suspected chemical attack, in the town of Khan Sheikhoun, northern Idlib province, Syria.
A man carrying a child following a suspected chemical attack, at a makeshift hospital in the town of Khan Sheikhoun, northern Idlib province, Syria.
Turkish experts evacuate a victim of a suspected chemical weapons attacks in the Syrian city of Idlib, at a local hospital in Reyhanli, Turkey.
Turkish experts evacuate a victim of a suspected chemical weapons attacks in the Syrian city of Idlib, at a local hospital in Reyhanli, Turkey.
This photo provided by the Syrian anti-government activist group Edlib Media Center, which has been authenticated based on its contents and other AP reporting, shows the bodies of children who died following a suspected chemical attack, at a makeshift hospital in the town of Khan Sheikhoun, northern Idlib province, Syria. The attack killed dozens of people, Syrian opposition activists said, describing it as among the worst in the country's six-year civil war.
This photo provided by the Syrian anti-government activist group Edlib Media Center, shows Syrian doctors treating a child following a suspected chemical attack, at a makeshift hospital, in the town of Khan Sheikhoun, northern Idlib province, Syria.
This frame grab from video, shows a Syrian man carrying a man on his back who has suffered from a suspected chemical attack, in the town of Khan Sheikhoun, northern Idlib province, Syria. The suspected chemical attack killed dozens of people Syrian opposition activists said, describing the attack as among the worst in the country's six-year civil war.
