Riverside firefighters extinguished a building fire Saturday in Riverside.
The fire in the 2500 block of Prospect Avenue was reported at 3:54 p.m., according to the Riverside Fire Department.
The department dispatched 21 firefighters, four engine companies and one truck company to the scene, the department said.
The blaze caused an estimated $100,000 in damages, the department said.
No injuries were reported and the cause of the fire remained under investigation, the department said.