London, November 22 (RHC)-- The U.S.-led airstrikes in Syria have killed 910 people, including 52 civilians, since Washington launched its aerial campaign against the ISIL terrorists and other militants two months ago, an observatory group says.

The British-based so-called Syrian Observatory for Human Rights on Saturday released the figures based on information from what it said was a network of contacts in Syria.

According to the group, among those who were killed were 785 members of the ISIL and 72 members of the al-Qaeda-linked al-Nusra Front, while the remaining belonged to other unnamed militant groups.

The U.S. and its military allies started their air campaign in Syria in September without any authorization from Damascus or a United Nations mandate. However, the U.S.-coalition’s airstrikes have also hit Syrian infrastructure, including oil and gas facilities. The coalition has also attacked the provinces where the ISIL militants are not active.

The U.S. and its allies have been the staunch supporters of the al-Qaeda-linked militants fighting the Syrian government, providing funds and weapons to mercenaries inside Syria.