At least 15 civilians were killed on Saturday by U.S.-led airstrikes, which targeted areas in the countryside of the northern province of Raqqa, the de facto capital of the Islamic State (IS) group, a monitor group reported.

Four children and a woman were among those killed by the airstrikes that targeted the town of Haideh in the western countryside of Raqqa, said the Syrian Observatory for Human Rights.

Tens of civilians have recently been killed by the airstrikes of the U.S.-led anti-terror coalition.

Late last month, a U.S.-led airstrike targeted a school housing displaced people in the town of Mansura in Raqqa countryside, killing 33 people, according to the Observatory.

The U.S. previously acknowledged the falling of civilian victims as a result of the airstrikes they have been conducting since intervening in Syria in 2014.

Source: Xinhua