Updated

Syrian activists say airstrikes have killed at least 12 civilians in an eastern Syrian village held by the Islamic State group.

Deir Ezzor 24 says Tuesday's attack targeted the village of al-Jarthi. The Britain-based Syrian Observatory for Human Rights says 21 civilians were killed, among them 9 children. It says Russia carried out the strikes, in support of U.S.-backed, Kurdish-led forces driving to capture IS territory on the Euphrates River.

The extremist group still controls patches of territory in eastern Syria, where it imposes a media blackout.

The Kurdish-led Syrian Democratic Forces on Sunday thanked both the U.S. and Russia for their military support, days after the U.S. announced it would stop arming the group.