It said there were "conflicting reports of air raids and two explosions on the ground".

BBC: Syria crisis: Dozens killed by Aleppo university blasts

The explosions were thunderous, close enough to rattle the ground.

NEWYORKER: The Thin Red Line

Six months living in holes in the ground that he had to dig out everyday, listening to artillery shells going off and explosions all around him.

BBC: NEWS | Middle East | Iraq war trauma: Your experiences