At least 36 civilians have been killed in air strikes by Syrian government warplanes on the Islamic State-held northern city of Raqqa, activists say.
Most of the casualties were caused by two strikes in quick succession on an industrial area, the UK-based Syrian Observatory for Human Rights reported.
One opposition activist network said more than 80 people had died.
Syrian government and US-led coalition aircraft frequently bomb Raqqa, which IS has made into a stronghold.
Activists say most of the casualties from the raids have been civilians, BBC informs.
