EL MONTE, Calif. (KABC) -- Dozens of firefighters responded to a three-alarm fire at Mountain View High School in El Monte on Monday morning.

Officials say the fire broke out in the cafeteria building just before 2:30 a.m. Part of the building has collapsed.

One firefighter suffered a minor back strain. No other injuries were reported.

School is not in session due to Martin Luther King Day. The cause of the fire was not immediately known.

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