OKLAHOMA CITY - Firefighters battled a two alarm commercial fire Sunday evening  in Northwest Oklahoma City. 

According to officials, the fire started around 9:30 p.m. near Northwest 5th Street and North Pennsylvania Avenue. Multiple cars and an RV are reported to have caught on fire. 

Officials said there were reports that 55 gallon drums were at the rear of the building, with unknown contents. The building was believed to potentially be a chemical storage warehouse.  

Hazmat crews also responded to the scene, officials said. 

Traffic control was issued near Northwest 5th Street and North Virginia Avenue.