Around 2:45 p.m, yesterday, The University of Pittsburgh had a small explosion in the Clapp, Langley and Crawford Hall complex on Fifth Avenue, according to University of Pittsburgh spokesperson Joe Miksch. The hall houses the biological sciences and neuroscience department.

The explosion was contained by a fume hood designed to limit exposure to hazardous materials, according to Miksch.

Students were evacuated temporarily as a precaution. The Halls are back open except for the first floor of the Chevron Annex building.

One student was evaluated for an eye irritation.