Authorities in Mississippi are searching for a suspect accused of shooting a man to death during an interstate road rage incident, according to Mississippi Highway Patrol.

The Mississippi Bureau of Investigations responded to a shooting call around 4:30 p.m. Monday and found a truck sprayed with bullet holes on an interstate near Ocean Springs, The Sun Herald reported, citing Highway Patrol Sgt. Justin Elkins.

The driver of the truck was taken to a hospital and pronounced dead, authorities said. He was not immediately identified.

Investigators determined the victim and a suspect had been engaged in a road rage incident that began about 20 miles (32.19 kilometers) down the highway before the suspect began shooting at the truck, according to Highway Patrol.

The suspect’s vehicle had Louisiana license plates and continued driving after the shooting, Elkins said. The agency on Monday asked any witnesses who were on the road at the time to come forward.