AFP, Beirut :Air strikes on a market in Syria’s Al Qaeda-held city of Idlib killed at least 21 civilians on Sunday, as hundreds fled a besieged IS bastion near the Turkish border.Five children were among those killed in the air raids on Idlib, which is held by Al Qaeda affiliate Al-Nusra Front and its allies, the Syrian Observatory for Human Rights said.Peace talks towards ending Syria’s five-year war have stalled, with no immediate end in sight to a conflict that has killed 280,000 people.It was not clear who carried out the Idlib strikes, but the Observatory has reported previous air raids by the regime and its Russian ally on Idlib province, which is also controlled by Al-Nusra and rebel allies.Footage the Observatory said was filmed after the Idlib strikes showed emergency workers training water hoses on a tall building amid a haze of smoke.