Clarion State Police on Sunday identified a Lycoming County man who died Friday in a vehicle crash on Interstate 80 in Butler County.

A report about the accident that killed Thomas W. Roberts, 45, of Trout Run, Pa., was released Sunday by Clarion State Police.

According to the report, police responded to the accident around 8 p.m. Friday at mile marker 43.8 in the eastbound lane, which is in Allegheny Township.

Police said Roberts was driving east in a 2016 Freightliner Cascadia when he brought the truck into a left-banking curve.

“The trailer rolled onto the passenger side of the vehicle,” said the investigating officer in the report.

Police said Southern Clarion County Ambulance took Roberts to Clarion Hospital, but Roberts died because of injuries suffered during the crash.

Emlenton Volunteer Fire Department Chief Trevor Hile said that upon arrival at the scene, firefighters discovered the trailer was leaking a hazardous, flammable gas.

“We had to rapidly assist EMS with their care of the patient and rapidly load the patient into the ambulance,” Hile said.

Once the patient was removed from the scene, firefighters established an isolation area of about 800 feet. Hile said that distance was recommended by PennDOT.

“We did deploy a vapor-suppression hose line in case we started to have a bigger leak, or if some type of fire broke out,” Hile said.

Firefighters also directed traffic because the interstate's eastbound lane was completely blocked.

Hile said firefighters remained on scene for about five hours. Fire crews from St. Petersburg and Parker also responded, as well as Emlenton and Knox ambulance services.

Also responding was Butler County's Hazmat Team 100.

The team's Chief Kevin Smith said it took longer than usual to make the lengthy trip to the interstate because traffic was backed up behind the crash in the eastbound lane.

Smith said that when his crew arrived, they found the truck lying on its side. Inside, they found four 40-foot-long cylinders containing consumer-grade, condensed natural gas.

“They're all tied together in a cascade system,” Smith said. “There was a small leak in the piping that ties the cylinders together. We found one valve that was open a bit, and we turned the valve.”

Smith said the leak appeared minor and did not have any lasting effects.

“They just wanted us to double-check (the container) for them,” he said.