LARAMIE COUNTY, Wyo. (KGWN) - UPDATE 1:52PM
The Laramie County Sheriff's Office says the two other crew members involved in the train derailment were evaluated at Cheyenne Regional Medical Center and released.
UPDATE 9:07AM FRIDAY
Exit 345 on I-80 (Warren Road) is now closed after a train derailment Thursday night. The truck parking area at the interchange, and the service road (Harriman Road) are also closed, however through traffic to the quarries in that area is allowed.
The closure comes at the request of Union Pacific Rail Road's safety team as cleanup work begins. UPRR says it could take up to 10 days to clean up the site.
The closure will remain in place as cleanup continues.
More information will be provided as it becomes available.
One person is dead and one is still missing after two trains were involved in a rear end collision west of Cheyenne Thursday evening.
Around 7:45 p.m. the Laramie County Sheriff's Office received a call about a train derailment. Two trains were travelling eastbound near exit 345 on I-80 when the rear train collided with the other. It is reported that both trains were Union Pacific. There were four personnel on board the two trains. One was confirmed dead on the scene, one is still missing in the wreckage and the other two were being treated at the hospital.
Wyoming Highway Patrol was on scene along with the Region 7 Hazmat Team. There was a mix of cargo on the trains, but there was no immediate health hazard.
From I-80, drivers could see roughly 20 law enforcement and emergency management vehicles and more personnel.
Exit 345 was closed to all traffic along with the Frontage Road along I-80.
This is a developing story.