Sanford police say James Comppen, 57, suffered head and internal injuries when the bicycle he was riding collided with a car on Main Street on Wednesday evening.
Sgt. Craig Andersen said in a statement Thursday that Comppen, of Sanford, underwent surgery Wednesday night and was being treated at Maine Medical Center in Portland.
Clay Holtzman, a spokesman for the hospital, said Comppen was listed in serious condition Thursday night.
Comppen was riding north on Main Street, near the intersection with Acorn Street, around 6 p.m. when the bicycle he was riding collided with a car, Andersen said.
Comppen was flown by LifeFlight helicopter to Maine Medical Center.
The driver of the vehicle, a minor, was not injured.
No charges have been filed and the investigation into the crash continues.
Dennis Hoey can be contacted at 791-6365 or at:
