Syrian activists say death toll in blasts at Aleppo University rises to 87

Anti-regime activists say the death toll in two big explosions on the campus of a Syrian university has risen to 87.

The Britain-based Syrian Observatory for Human Rights said Wednesday that the number of those killed in the blasts at Aleppo University could rise even further because medics have collected more unidentified body parts and some of the more than 150 injured are in critical condition.

It remains unclear what caused the Tuesday blasts, whose aftermath was documented in videos posted online and shown on Syrian state TV.

Anti-regime activists accused forces loyal to President Bashar Assad of launching airstrikes on the campus. The state news service said a "terrorist group" fired missiles.

The U.N. says more than 60,000 people have been killed since Syria's conflict began in March 2011.