NORTHRIDGE ( ) — Crews were responding Friday to an electrical vault explosion that is believed to have caused a power outage at Cal State Northridge, officials said.

One person was reported injured when the steel vault cover fell onto a car at the intersection of Nordhoff Street and Reseda Boulevard, according to an LADWP spokesperson.

Several cars were involved in a crash related to the explosion, said officials.

Power was restored to the CSUN campus shortly after 3 p.m., according to officials.

The cause of the explosion was not immediately known.