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A particularly deadly Saturday on Utah's roadways ended with three people dead in two accidents.

Two women were killed in a collision about 2:30 p.m. on Interstate 80 at mile marker 170, which is east of Echo Canyon Reservoir and about 12 miles north of Coalville. Utah Highway Patrol spokesman Jesse Valenzuela said that an eastbound Mazda sedan driven by 29-year-old Kallie Nelson crossed the median into the westbound lanes and struck a Mercury sport utility vehicle driven by Judith Nethercott, 65.

The crash killed both drivers, who had no passengers. Both women died at the scene.

Officials continued to investigate Saturday why Nelson's car crossed into the opposite lane.

Earlier in the day, a 20-year-old man died at about 2:20 a.m. in West Valley City when he ran a stop sign and crashed into a concrete barrier.

Police said Cristobal Aguilera was traveling north on 3600 West when he hit the barriers on South Frontage Road, near 2100 South, according to West Valley City Lt. Rick McLenon. The man was already dead at the scene when police arrived.

McLenon said a passerby reported the accident and that the cause of the accident is unknown. Aguilera's body has been turned over to the state medical examiner to determine if drugs, alcohol or a medical condition could have played a role. There was no evidence at the scene of the accident that shed light on a potential cause.

McLenon described the intersection where the accident happened as a T, with concrete barriers separating the road from the freeway.

The man was the only occupant of his vehicle, and no other cars were involved in the accident.

Jim Dalrymple II