BEIRUT - Syrian rebels blew up a tunnel packed with explosives in the northern city of Aleppo on Friday, killing at least 20 pro-government fighters, activists and rebels said.
The Britain-based Syrian Observatory for Human Rights activist group said the blast took place near the Zahrawi market not far from the citadel in Old Aleppo. It said clashes followed the explosion.
A powerful rebel alliance called the Islamic Front claimed responsibility for the blast. It said in a tweet that it killed at least 40 government gunmen. (AP)