A motorcyclist was seriously injured Friday in a crash on Court Street in Auburn.

AUBURN — A motorcyclist who was severely injured Friday when he was struck head-on by a car that reportedly drifted into oncoming traffic on Court Street has died.

Reginald Clement, 54, of Anson, was traveling east on Court St., according to Auburn police. The motorcycle he was driving and a 2006 Chrysler driven by Steve Primavera, 33, of New Gloucester, collided head-on.

Clement was transported to Central Maine Medical Center in Lewiston by Auburn Fire and Rescue, where he later died as a result of his injuries. Primavera was not hurt.

Witnesses said Clement was headed toward the downtown with another motorcyclist when Primavera drifted into the oncoming lane, causing the bikers to crash.

The car slammed into one of the bikes, witnesses said. The woman who had been driving the second motorcycle was not seriously injured in the 5:45 p.m. collision.

Clement was unconscious and didn’t have a pulse when first responders arrived, witnesses said.

Ami Cantrell Seamon, who lives near the crash site, was the first person on scene.

“I heard the crash,” she said. “My first response was to grab towels. I hiked my skirt up and just ran. I was doing a lot of praying.”

When she got to the biker, Seamon said, he was unconscious.

“He was out and he didn’t have a pulse,” she said.

A nurse who responded to the crash administered CPR, witnesses said.

Police blocked off a section of Court Street, near the intersection at Western Avenue, as emergency crews arrived.

Zackary Lavoie of Lewiston was headed outbound on Court Street with his wife when the crash unfolded ahead of them.

Lavoie said when the Chrysler drifted into oncoming traffic, the motorcycle riders swerved to avoid a collision. They crashed into each other, Lavoie said, and a moment later, the Chrysler plowed into one of the bikes, knocking the rider off.

“He just went flying,” Lavoie said.

The Chrysler came to rest on a sidewalk, pieces of the front end dangling, its hood popped open.

“This is just heartbreaking,” said Seamon, still clutching the towels she had brought out of her home. Other witnesses approached to thank her for coming so swiftly to the biker’s aid.

“It’s amazing how your adrenaline and your instincts kick in,” Seamon told them. “All I knew was that I had to help. I would have done anything to help him.”

Both motorcyclists were wearing helmets, witnesses said.