Redwood City, Calif.: 6-Alarm Fire in Apartment Complex

A blaze at 926 Woodside Road, Redwood City, Calif., on Thursday, Oct. 17, 2013. (Screenshot/NBC)

A six-alarm fire consumed a Redwood City, Calif., apartment on Thursday morning. 

Firefighters told NBC Bay Area news that several people may be injured, but details are not yet available. 

The fire was reported at 5:30 a.m. in the 900 block of Woodside Road, or Highway 84. 

The roof collapsed and flames engulfed the entire top floor as of 6:15 a.m., reports ABC 7. The cause has not yet been determined.