The Clark County Coroner identified two men killed in a fatal crash on U.S. Highway 93 Wednesday morning.

Christopher Markley, 34, and Robert Jay Barns, 50, both died from multiple blunt force injuries, according to the coroner's office.

Nevada Highway Patrol said a semi-truck driver admitted to "drowsy driving" Wednesday morning when he struck multiple vehicles resulting in the death of Markley and Barns.

The crash was reported just after 6 a.m. on U.S. 93 and mile marker 63, near Interstate 15.

According to Trooper Jason Buratczuk, of Nevada Highway Patrol, motorists were stopped for a flagger in a construction zone when a semi-truck struck the vehicles.

The semi-truck hit the Toyota Corolla that Markley and Barns were traveling in, Buratczuk said. They were ejected from the vehicle and pronounced dead at the scene. The truck then hit a Nissan, another semi-truck and a Chevrolet Malibu.

Buratczuk said the driver of the semi-truck who hit the vehicles admitted to "drowsy driving" and may have fallen asleep at the wheel.

"Drowsy driving is just as bad as if you were intoxicated or texting and impairs your ability to drive a vehicle," Buratczuk said, adding motorists need to be careful in construction zones.

Three others were taken to University Medical Center with non-life threatening injuries, including the at-fault driver of the semi-truck, according to officials.

Buratczuk said the driver of the semi-truck could face charges however, he noted it will be up to fatal crash investigators and the district attorney.

All travel lanes are closed and traffic is being diverted onto State Route 168, NHP said. U.S. 93 is also closed at I-15. The closure was expected to last approximately three hours, Buratczuk told FOX5 at approximately 9 a.m.

An investigation was ongoing.

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