CASPER — Four contracted workers from Texas were injured in a flash fire at a southeastern Wyoming natural gas processing plant.

The men work for AltairStrickland, a mechanical contracting firm based in La Porte. President Jeffrey Weber told the Casper Star-Tribune that all four are from the Lufkin, Texas area.

They were injured Wednesday morning while working at ConocoPhillips’ Lost Cabin gas processing facility in central Wyoming.

Cody Clark, Dwayne Bennet, Chris Lowe were listed in critical condition at the Western States Burn Center in Greeley, Colo. this week. Joey Holloway is being treated at Riverton Memorial Hospital but his condition isn’t known.

The fire is under investigation.