Champagne said six workers were cleaning a pipeline when the fire broke out. Two were taken to St. Anne Hospital in Raceland with burns, and one of those was later flown to a burn unit in Baton Rouge, Champagne said.
The other was later released from the hospital and three others were treated at the scene, officials said. Another worker had not been accounted for as of around 10:30 p.m. and a search was being conducted.
People who were nearby reported a “boom” from the high-pressure gas pipeline about 7 p.m., Champagne said. “A lot of people heard an explosion.”
The high-velocity pipeline contains propane and possibly other similar gases, according to officials.
The American Red Cross opened a shelter for evacuees at the Edward A. Dufresne Community Center at 274 Judge Edward Parkway in nearby Luling. Recreation center employees are helping the Red Cross operate the shelter.
The cause of the explosion is under investigation.