Syrian activists say 52 killed in Aleppo blasts

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In this citizen journalism image taken on Monday, Jan. 14, 2013, provided by Aleppo Media Center AMC which has been authenticated based on its contents and other AP reporting, people gather around destroyed buildings after airstrikes that targeted Aleppo, Syria. (AP Photo/Aleppo Media Center AMC)

BEIRUT (AP) — Syrian activists say 52 people have been killed in twin explosions at the main university in the northern city of Aleppo.

The Britain-based Syrian Observatory for Human Rights said the number of dead was expected to rise because many of those injured in Tuesday's blast are in critical condition.

It says the dead included university students and civilians staying in the university dorms after being displaced by fighting between forces loyal to President Bashar Assad and rebels seeking to topple his regime.

It's unclear what caused the explosions, with each side blaming the other.