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.

Officials have confirmed the cause of Monday's pipeline explosion, fire in La Porte. Energy Transfer has set up a helpline for Deer Park residents.

The white SUV drove through a fence on the west side of the Walmart parking lot and struck an above-ground pipeline valve around 10 a.m. Monday. A fire erupted and residual product from the isolated pipeline has continued to burn off.