Pleasanton police are looking for more witnesses to an early Sunday crash that left a motorcycle rider with extensive injuries.
A police report said the incident occurred at about 1:08 a.m. at the intersection of Hopyard Road and Owens Drive.
One person who saw the crash said the rider, who was headed northbound on Hopyard, suddenly swerved right and hit the raised median that separates the right turn lane from through traffic.
The report said the rider then lost control and was thrown from the motorcycle.
The driver, who has not been identified, was taken to Eden Medical Center in Castro Valley. Anyone with information about the crash is asked to contact Pleasanton police at 931-5100.