At least 52 people were killed and dozens wounded on Tuesday in two explosions that rocked the university in Aleppo, Syria's biggest city, the Syrian Observatory for Human Rights said.
Two explosions hit the university during the day while students were sitting exams. The cause of the explosions was not clear but the government and opposition activists blamed each other.
The Observatory said in a statement that its death toll was based on reports from doctors and students.
Meanwhile, permanent United Narions Security Council member Russia said in a Foreign Ministry statement on Tuesday that an effort by dozens of countries to refer the Syrian crisis to the International Criminal Court was "ill-timed and counterproductive".
More than 50 countries asked the Security Council on Monday to refer the crisis in Syria to the court, which prosecutes people for genocide and war crimes.
Want to enjoy 'Zen' reading - with no ads and just the article? Subscribe todaySubscribe now