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Firefighters and a hazmat crew responded to a structure fire early Wednesday in Boyle Heights, officials said.

The fire was reported at about 3:34 a.m. at 3529 E. Olympic Blvd. More than 90 firefighters worked the fire and had it extinguished in 54 minutes, the Los Angeles Fire Department reported.

A hazmat team was also on scene to evaluate “any hazards” regarding tanks that were discovered inside the structure, fire officials said.

As of 4:30 a.m., a section of Olympic Boulevard was closed.

The cause of the fire was under investigation.

No injuries reported.