PITTSBURGH — Officials say a small explosion in a science complex at the University of Pittsburgh prompted a brief evacuation, and one student reported eye irritation.

University spokesman Joe Miksch says the blast happened at about 2:45 p.m. Wednesday in the Life Sciences Annex in the Clapp, Langley, and Crawford Hall complex, which houses the biological sciences and neuroscience department.

He says the explosion was contained by a fume hood that is designed to limit exposure to hazardous or toxic materials. One student was evaluated by paramedics due to eye irritation.

The building was evacuated as a precaution but reopened about 45 minutes later except for the first floor of the life sciences annex, which is being cleaned up..