At least two people were killed overnight Wednesday in an apparent road rage attack across western Oklahoma that involved multiple cars, authorities said.

The first calls came in at about 11:35 p.m. local time in Canadian County, west of Oklahoma City, with reports of a shooting on Interstate 40. As the vehicle traveled westbound through two more counties, multiple shots were fired at numerous cars, Custer County Sheriff Bruce Peoples told NBC News.

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At least one person was killed in Caddo County, and the second in neighboring Custer County, Peoples added. The victims were not immediately identified.

A suspect was chased by the Oklahoma Highway Patrol for about 45 miles. The gunman — an unidentified male driver — was arrested early Thursday without incident in Custer County, and was being held in the county jail, authorities said.

The Oklahoma State Bureau of Investigation is handling the case.

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