An explosion at a science building on the University of Southern California campus

An explosion at a science building on the University of Southern California campus has resulted in at least one injury.

The Los Angeles Fire Department said that the explosion happened at about 4 p.m. in the 900 block of Bloom Walk on campus. 

Occupants evacuated the science building where the explosion occurred and met crews outside. Crews continued to evacuate the building and requested a hazmat team. 

There is no active fire. The explosion was reportedly caused by a hydrogen and methane reaction.

This is the fourth time that LAFD has responded to a hazmat emergency at USC since September and the second time they responded to this specific building.

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