Authorities say three men were killed when the car they were in slammed head-on into a tractor-trailer near Craig in northwestern Colorado.

Colorado State Patrol Trooper Bonnie Collins says the men, whose names have not been released, were traveling on U.S. Highway 40 at milepost 65.3 when they crashed at 2:30 am Saturday. All three were pronounced dead at the scene, and the driver of the semi suffered what has been described as moderate injuries.

Troopers say the men in the car range from ages 19 to 35 and were all from the Front Range. The driver of the truck from Casper, Wyoming, is being identified as Rickie Jenkins, 53.

Authorities say the car going westbound crossed the center line before crashing into the semi. Jenkins was able to escape injury after his truck caught fire.

The road was closed from approximately 3:00 am to 1:00 pm as a result of the crash. The Colorado State Patrol Hazardous Materials Unit responded to the scene. The Colorado Department of Transportation and LT Environmental assisted in the cleanup of the roadway. 

The cause of the crash is still under investigation.