At least 16 people, most of them students, have been killed in an air attack that hit a high school in the rebel-held Syrian city of Raqqa, opposition activists say.
Graphic amateur video said to be filmed on Sunday in Raqqa, in northeastern Syria, showed several bloodied bodies strewn across a dirt yard, some torn in half.
Opposition activists based in Raqqa, a city of around 250,000 people, said there were more than 30 people wounded besides the fatalities.
Al Jazeera cannot independently verify the reports due to reporting restrictions inside Syria.
Raqqa has been under the control of fighters battling to overthrow President Bashar al-Assad since March but the city remains subject to regular aerial bombardment by government forces.