A 53-year-old man crossing Main Street on Thursday evening was struck by a car, which police say fled the scene. A search is underway for the car and the driver.

BROCKTON — A man was left clinging to life Thursday evening when he was struck by a car while crossing the street.

Police say that car left the scene and a search is still underway for the driver as of Friday morning.

The crash happened about 7:20 p.m. near the intersection of Main Street and Somerset Place, in the southern part of the downtown.

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When officials arrived on scene, the victim, a 53-year-old Brockton man, was lying in the southbound lane.

"He was unconscious but breathing at the time," said police spokesman Darren Duarte.

A Chevrolet Avalanche pickup truck was on scene, stopped in the northbound lane, but police quickly learned the driver of that vehicle was only a witness to the crash.

Police say the car that had struck the victim left the scene.

"Witnesses told police that the pedestrian ran across Main Street in front of a northbound vehicle," Duarte said.

The suspect is believed to have been driving a gray station wagon, in the style of a Ford Escort Wagon, Duarte said. The car kept driving northbound on Main Street after the crash, witnesses told police.

Brockton firefighters and Brewster Ambulance paramedics treated the victim at the scene. He was then rushed by ambulance to Good Samaritan Medical Center in Brockton.

The victim was later taken to Brigham and Women's Hospital in Boston for further treatment.

Police say the victim was in critical condition last they knew.

"Witnesses say it was dark and rainy at the time of the accident," Duarte said. "One witness believes that if the operator had only stopped, the accident would not have been his fault because the victim ran in front of him."

A sheriff's deputy with the Plymouth County Bureau of Criminal Investigation responded to photograph the scene.

State police detectives assigned to the Plymouth County district attorney's office are assisting in the investigation.

Senior reporter Cody Shepard can be reached by email at cshepard@enterprisenews.com. You can follow him on Twitter at @cshepard_ENT.