He is expected to be okay, officials said.

This story has been updated with additional information from police.

A man was shot in the head in an apparent road rage incident early Thursday morning, according to officials with the Dallas police.

It began with a minor collision around 4:30 a.m. at the intersection of an Interstate 635 service road and Abrams Road, police said.

A man and woman were driving westbound in the center lane on the service road when another driver in a right-turn-only lane continued straight and side-swiped them before taking off, according to police.

The man and woman then chased after the car to get the license plate number. They pulled in front of the car and blocked him at the Greenville Avenue stoplight, police said. He then pulled onto the sidewalk to get around them. Both cars then turned right on to Greenville.

At that point, the man turned his bright lights on to get the license plate number, and the suspect allegedly leaned out of his window and shot at the car, according to police.

The bullet grazed the man's head, but the man was able to drive his car to a nearby gas station, where he was taken to a hospital.

He is expected to be okay, officials said.

The woman in the car with him was not hurt in the incident.

The suspect fled from the scene, police said. An investigation in to the shooting is ongoing.

This is a developing story. Download our free WFAA app to stay up-to-date on all news stories in the Dallas-Fort Worth area.