At 10:33 p.m. Sunday night, LAFD responded to a reported commercial fire in the 7500 block of Clybourn. Firefighters located a commercial business with heavy smoke. Knockdown was quickly achieved, and further investigation revealed a grow operation for marijuana plants. The cause of the fire is being investigated as an electrical fire. Police and arson investigators were requested to the scene. LAPD Foothill Division will be handling the investigation.