A 21-year-old Livermore man died Sunday afternoon when his motorcycle lost control on Interstate 580 a mile west of the Grant Line Road interchange in far eastern Alameda County, the California Highway Patrol said.
The crash was reported at 1:05 p.m. Sunday. The motorcyclist, whose name was not released Sunday afternoon, appeared to have been "lane splitting," passing between vehicles, when he was hit, said CHP Officer Tyler Hahn.
The man was pronounced dead at the scene.
There wasn't any evidence that rainy conditions contributed to the crash, Hahn said. Initial witness reports indicate the motorcyclist may have been hit by another vehicle, possibly a white SUV, but that had not been confirmed as of late Sunday afternoon, Hahn said.
Investigators remained at the scene late Sunday afternoon.