The FBI and Deer Park Police are investigating an SUV as the potential cause of Monday's large pipeline fire after the driver drove through a fence and crashed into an above-ground pipeline valve, city officials said.

DEER PARK, TX – It’s been a difficult week for Diane and Steve Hutto, and many other families in the Deer Park and La Porte area after Monday’s pipeline blast and fire. The natural gas fire was so intense, it melted shingles off nearby roofs and plastic off cars.

The towering flame has greatly subsided, four days after a vehicle drove through a fence and struck an above-ground valve, causing a massive pipeline explosion.