The crash occurred at 11:37 a.m. under a snow-dusted hill in Green River, Wyo., according to the State Transportation Department. By 5 p.m., the tunnel, which leads traffic west on Interstate 80, had been evacuated and the scene had “been contained,” the department said in a statement.

Investigators in Wyoming began sifting through the wreckage inside a highway tunnel Saturday after smoke, hazardous chemicals and structural concerns prevented them from determining how many people may have died in the fiery pileup.

Interstate 80 was closed in Green River after the crash and will likely remain so until at least Wednesday, officials said. The roadway runs from San Francisco nearly to New York City.

At least two people were killed in a "multi-vehicle crash" in an interstate tunnel, Wyoming authorities confirmed Friday.

A fatal multi-vehicle crash in a tunnel along I-80 in Wyoming has killed at least two people, the Wyoming Department of Transportation (WYDOT) said on Friday. Newsweek reached out to WDOT via online form for comment.

The eastbound Green River tunnel on Interstate 80 has reopened almost a week after a fiery crash that left three people dead.

State authorities say 18 people suffered injuries and received care at a Rock Springs hospital. Meanwhile, recovery efforts continue, and traffic could flow through the unaffected side starting Thursday.

Authorities said the body of a third victim was discovered following the deadly multi-vehicle crash in Wyoming last week that caused a fire in a highway tunnel.

Authorities have confirmed a third person died in the massive wreck and fire that ignited Friday in the Green River Tunnel on Interstate 80.

Another person has been confirmed dead as the investigation continues into a major, multi-vehicle crash in the westbound tunnel of I-80 in Green River, Wyoming, according to the Wyoming Dept. of Transportation.