A Colorado state trooper was killed when he was struck by a vehicle as a blizzard hit parts of the state on Wednesday.

Cpl. Daniel Groves, 52, was assisting a vehicle that slid off Interstate 76 in Weld County when someone driving a Volvo "lost control" and hit Groves, who was outside of his patrol vehicle, Colorado State Patrol said on Twitter.

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Groves was transported to the hospital, where he was pronounced dead.

The driver who allegedly hit Groves, 58-year-old John Carpenter, was also transported to the hospital with moderate injuries, officials said.

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The National Weather Service had issued a blizzard warning for Weld County and surrounding areas in eastern Colorado on Wednesday. Authorities are investigating "high speed in poor driving conditions" as a possible cause of the accident.

Groves had worked with the Colorado State Patrol since July 2007, according to the department.