At least 30 civilians were killed when a US-led airstrike hit a prison run by the Islamic State (ISIS) in Syria's city of Raqqa,
The strike by the US-led coalition struck the prison on Monday where the civilians were held captives by IS in the central part of Raqqa, Xinhua news agency reported.
The attack came hours after the US coalition struck areas in Mayadeen city in the eastern province of Deir al-Zour, killing tens of people, according to the state TV.
Since entering Syria to fight IS in 2014, the US coalition has killed tens of civilians in areas controlled by IS in northern and eastern Syria.
The US has been recently heavily backing the Kurdish-led Syrian Democratic Forces in their push to capture Raqqa, the de facto capital of IS in Syria.