HOLLIS – Sebastian Abt, a 21-year-old Brookline resident and 2010 Hollis Brookline High School graduate, died Thursday morning of multiple injuries sustained in an accident involving his car and a commercial truck, police said.

Abt, of 11 Milford St., Brookline, was driving a 2011 Chevrolet Cruze on Proctor Hill Road, which is Route 130, in Hollis when the accident occurred.

Police said Abt’s car and a Freightliner commercial box truck collided at about 7:45 a.m. near 169 Proctor Hill Road, a spot just east of the Brookline-Hollis town line and a short distance west of the Diamond Casting and Machine Co.

Police said Abt was alone in the car. The driver of the truck, who was also alone, was not injured.

Route 130, a major east-west road that is typically busy with traffic during morning and afternoon rush hours, was closed for several hours as police and firefighters worked the scene.

No further details were released by police Thursday evening. They said the accident remains under investigation.

Earlier in the day, Hollis Sgt. Brendan LaFlamme said the crash had claimed a life.

“What we’re dealing with is a fatal car accident,” LaFlamme said. “It’s a commercial vehicle that collided with a passenger vehicle. We do have one deceased individual. We’re still working to determine his identification.”

“Initial investigation shows that one vehicle was traveling west, another was traveling east,” he said.

Apt was a member of the class of 2014 at Daniel Webster College in Nashua.

“DWC will miss you,” the school tweeted Thursday night.