LEWISTON — A motorcyclist was seriously injured Monday afternoon after his bike collided with a car on Sabattus Street.

Witnesses said the victim was knocked to the street where he remained unmoving following the 5 p.m. crash near Genest Street, across from Bourque’s Market.

The victim was taken to a Lewiston hospital, the extent of his injuries unknown. It did not appear the driver of the four-door car involved in the wreck was seriously hurt, although air bags inside the vehicle were deployed.

Both vehicles were traveling on Sabattus Street when they collided, one witness said. She added that the driver of the car had made attempts to avoid the collision.

“There was nothing he could do,” said Tatum Reynolds. “It happened so fast.”

Reynolds stopped her car and jumped out to help the victim after dialing 911. She sat with him while waiting for rescue crews to arrive.

She said the driver of the car appeared badly shaken, but otherwise unharmed.

The collision caused traffic snarls along Sabattus Street as police rerouted motorists around the crash site.

Police at the scene were interviewing witnesses as they investigated the cause of the crash.

Further information about the victim was not immediately available.

While police, fire and rescue crews were at the scene of the wreck, some had to scramble to Lisbon Street where a bicyclist had been struck.

According to witnesses, the bicyclist was bleeding from the head when emergency crews arrived. Two others were also taken to hospitals for dizziness and complaints of pain.

That crash, too, was being investigated by police early Monday night.