In this photo released by the Syrian official news agency SANA, Syrians stand in rubble of the damaged university building caused by an explosion in Aleppo, Syria, Tuesday, Jan. 15, 2013. Two explosions struck the main university in the northern Syrian city of Aleppo on Tuesday, causing an unknown number of casualties, state media and anti-government activists said. There were conflicting reports as to what caused the blast at Aleppo University, which was in session Tuesday. (AP Photo/SANA) ** Usable by LA and DC Only **