PITTSBURGH—Pittsburgh police were searching for a motorist who drove away after fatally running down a 46-year-old single father who was riding his bicycle.

Police say James Price was hit about 4:45 a.m. Wednesday while riding the bike he had used to drop his weight from about 350 pounds to about 230 pounds in recent years.

Price was wearing a helmet but died of injuries suffered when he was thrown from the bike.

Police believe the vehicle that hit Price was white or light colored.

Police have not named any suspects and say they don't have a description of the driver.