Palm Beach Gardens police are trying to track down a hit and run driver.
Not long after midnight Monday a vehicle struck a bicyclist on Alt. A1A south of Donald Ross Road, according to police.
The bike rider was in the bike lane at the time, police say.
Investigators are looking for a 2010 gray or silver Toyota Corolla with front-end damage.
The bike rider was last listed in critical condition.
Anyone with information is urged to call Palm Beach Gardens police at 561-799-4445.