Officials say human remains have been found inside an SUV that authorities say hit an aboveground valve on a pipeline in suburban Houston, causing a fire that has burned for four days.

Over 36 hours after the blast — which shot towering flames like a blowtorch above the suburbs of Deer Park and La Porte — authorities have provided few details about the circumstances leading up to the explosion.

A pipeline fire that forced hundreds of residents to evacuate in suburban Houston is burning for a third day, with no clear end in sight.

A Deer Park spokesperson said four people were injured, but provided no details about the seriousness of the injuries. One firefighter sustained minor injuries.

Evacuation orders have been lifted for residents in Deer Park, near the fire. The fire has been burning since Monday.