BOYLE HEIGHTS ( — Crews Friday investigated the cause of a fire that destroyed four businesses in Boyle Heights.

According to the Los Angeles Fire Department, the fire erupted shortly before 2 a.m. in the 2100 block of East Whittier Boulevard at Boyle Avenue.

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Upon their arrival, firefighters located flames burning within a single-story commercial strip mall.

About 75 firefighters were able to extinguish the blaze within an hour.

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No injuries were reported.

A Domino’s Restaurant, a laundromat and two other unoccupied business were subsequently destroyed by the fire.

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Firefighters said the building is considered unsafe to enter, which will delay arson investigators to determine the cause of the blaze.