A tree fire that spread to a two-story apartment building in the Westlake neighborhood of Los Angeles forced about 37 people from their homes Thursday night.

The Los Angeles Fire Department responded to the 1500 block of W. Cambria St. at 8:18 p.m. Thursday, where a heavy attic fire was reported.

The structure contained about seven units, according to LAFD spokesman Nicholas Prange, who said 74 firefighters extinguished the blaze in about 45 minutes.

Prange said the fire completely consumed the penthouse, with partial involvement of the second floor, where firefighters kept the first floor units from burning.

No injuries were reported. The cause of the fire is still under investigation.

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