The death toll from two large explosions that tore through one of Syria's biggest universities on the first day of student exams has risen to at least 83 people, a monitoring group has said.
The UK-based Syrian Observatory for Human Rights said dozens more were injured in the blasts at the University of Aleppo, but the group said it could not identify their source.
Some activists in Aleppo claimed a Government attack caused the explosions, while state television accused "terrorists" - a term often use to describe the rebel fighters - of firing two rockets at the school.
While Assad's opposition blame his troops for the deadly university bombing, the government says extremist group al Nusra is responsible.
Establishing the facts - who bombed what and how many people died - is almost impossible in a country where everyone mistrusts journalists.