Authorities say eight people have been hurt, three critically, in an explosion and fire at a commercial building in south Los Angeles County.

County Fire Inspector Keith Mora says the blast was reported shortly before 10 a.m. Tuesday at a business in La Habra.

Arriving firefighters found flames showing from the building. The fire has been contained.

The people who were hurt were transported to hospitals with unknown injuries.

Mora says the building houses a rim polishing business.