Four people are confirmed dead from a series of crashes on Interstate 80 between Laramie and Cheyenne, Wyoming.

Names of the victims have not been released, and officials say it could be awhile before they can make the names public.

Searchers found three people dead in the mangled wreckage
overnight and on Friday morning, in addition to the one victim
discovered Thursday.

The chain-reaction crash involving 33 vehicles started about 10:30 Thursday morning, when seven semi-trucks and a passenger car
slammed into each other and burst into flames. Subsequent crashes occurred as drivers stopped or swerved to avoid the other accidents.

Officials hoped to have eastbound lanes of I-80 open by 4:00 p.m. Friday.

Investigators blamed fog and wet roads for the pile-up, as well as motorists driving too fast for conditions. The collisions occurred on a stretch of interstate in the Laramie Mountains notorious for treacherous conditions, just not usually during summertime.

At 8,000 feet above sea level, it's the highest portion of Interstate 80, which runs between San Francisco and New York City.