LOS ANGELES >> Crews took about an hour to knock down a fire in a classroom on the campus of the University of California, Los Angeles.

Fire Department spokesman Brian Humphrey says the blaze was reported around 1:30 a.m. Tuesday on the third floor of the seven-story School of Dentistry building in Westwood.

Humphrey says 115 firefighters were able to contain the flames to the classroom and a nearby office area. No one was injured, and the cause is not known.

A damage estimate was not immediately available.