Activists say an airstrike by the Syrian military has killed at least 15 people and wounded dozens of others in the contested northern city of Aleppo.
The Britain-based Syrian Observatory for Human Rights and the Aleppo Media center say the airstrike targeted three buildings that were almost completely flattened in the rebel-held district of Kalassa, killing at least four children and trapping many people under the rubble.
It said the death toll was likely to rise. The Aleppo Media Center, which tracks violence in the city, said 33 people were killed and over a hundred wounded in the airstrike. The different figures could not be reconciled.
Aleppo has been the focus of a violent struggle for control since rebel forces pushed in and began fighting with government troops last summer.