Firefighters battled a two-alarm fire that engulfed a stolen vehicle before spreading to a commercial building and resulting in the hospitalization of a security guard due to smoke inhalation early Wednesday morning.

The structure fire, located at 933 Railroad Ave. was reported to fire officials at 12:16 a.m., Oakland fire Battalion Chief Eleanor Bolin-Chew said. 

The blaze was under control by 1:08 a.m., Bolin-Chew said.

The fire appeared to have started in a pickup truck, which had been stolen on Dec. 11 in Hayward. The flames then spread to a commercial building nearby.

The building's security guard was at the scene during the fire and was transported to a local hospital to be treated for smoke inhalation, Bolin-Chew said.

The cause of the fire was still under investigation Wednesday. No suspects had been identified in connection with the fire later that morning but there was a surveillance camera in the area that possibly had footage of the incident.