EAST BAKERSFIELD, Calif. - A structure fire in East Bakersfield left two firefighters injured.According to Kern County Fire Officials, at about 8:30 a.m. on Saturday, Oct. 5, Kern County firefighters responded to reports of a structure fire on the 2000 block of Edison Highway.During their response, heavy black smoke could be seen. This prompted the Battalion Chief to reinforce the alarm, meaning - more firefighters were requested to respond.As firefighters arrived on scene, they encountered heavy fire in a commercial building, with flames having already breached through the roof.Eventually, with assistance from the Bakersfield Fire Department, the fire was extinguished.However, two firefighters suffered minor injuries.One was transported to a local hospital for further evaluation.The cause of the fire is under investigation.