A Syrian air force raid killed at least 59 civilians at a market in a town held by Islamic State militants in northern Syria on Saturday, according to a monitoring group.
The strike on the town of al-Bab, northeast of Aleppo, used barrel bombs, which are steel drums full of shrapnel and explosives, the Syrian Observatory for Human Rights said. Syrian President Bashar al-Assad has denied the air force uses such devices.
Dozens of people were also wounded in the attack, according to the monitoring group, which gathers information from sources on the ground. The town has been the focus of several heavy bombardments by the military since late last year.