The California Highway Patrol is investigating a fatal accident near the Altamont Pass, according to reports.
At around 5:45 p.m. Saturday, a solo-vehicle crash was reported on eastbound Interstate 580 at Interstate Highway 205, just west of Tracy.
Officials say a red Honda Civic struck a lightpole and rolled over. One person died in the collision.
Further details from a report by the Contra Costa Times:
The gender of the victim was not released. The Alameda County Coroner was en route to the scene. Information on whether anybody else was injured was not available.
Bay City News Service contributed to this report.