An investigation is underway to determine what sparked a fire in South Los Angeles that damaged a home and at least three businesses Thursday morning.

The fire was reported on West Slauson Avenue shortly after 2 a.m.

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A group of about 100 firefighters were able to contain the flames quickly and no injuries have been reported.

Arson investigators are on the scene working to determine what caused the fire.

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One witness said he heard sounds like thunder coming from the fire.

The fire spread quickly, damaging a home, a cabinet business, a floral shop and an upholstery shop.

It is not clear h

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