SANTA FE SPRINGS, Calif. (CBSLA) – Fire crews battled a three-alarm fire at a commercial structure in Santa Fe Springs Wednesday afternoon.

Firefighters responded to the building in the 9600 block of John Street just after 4:30 p.m.

The structure has been identified as a metal shop, and officials said titanium was burning inside.

No injuries have been reported, according to the Downey Fire Department.

The cause of the fire has not yet been determined.