Beirut: At least 50 people have been killed and scores injured in air strikes in Syria’s eastern Deir Al Zor province on Wednesday.

The identity of the war planes that carried out the bombardments was not known, the reports said.

On Tuesday, at least 57 people died in an aerial attack on a prison run by Daesh in the Deir Al Zor city of Mayadeen, the Syrian Observatory for Human Rights reported.

Those killed included 42 prisoners and 15 Daesh militants, the British war monitor said, adding that “in all probability” the air raids were carried out by the US-led international coalition against Daesh.

The coalition has been accused repeatedly this year of causing civilian casualties as it targets Daesh’s rapidly shrinking territory in both Syria and Iraq, but US military officials say higher civilian casualties were always expected as the Daesh militants are increasingly squeezed into shrinking territory.