Government shelling in the northern Syrian province of Raqqa killed about 20 people, at least 8 of them children, a video posted by activists on Wednesday showed.

The Syrian Observatory for Human Rights published a video showing rows of the blood-stained bodies laid out on blankets.

The sound of crying relatives could be heard in the background.

The shelling hit the province's al-Qahtania village, but it was unclear when the attack happened.