1 dead, 6 injured in San Leandro crash involving DUI driver

One person has died and six others were injured Saturday in a multicar highway collision in San Leandro, including two people who were ejected from their vehicles, authorities said.

California Highway Patrol Officer Dustin Kennerly said a driver drove into the back of another car on Interstate 880, causing it to overturn. Kennerly said the driver of the first vehicle was arrested for driving under the influence, but the driver of the second vehicle was not at the scene.

It is unclear how that driver left or if they were transported to a hospital before authorities arrived.

A good Samaritan stopped and got out of their car to help but was fatally struck by another vehicle unrelated to the original crash, Kennerly said.

Two other people were injured and transported to hospitals with non-life threatening injuries. It is unclear how those injuries occurred.

The Alameda County Fire Department responded to the scene, calling it a mass casualty incident.

An investigation is ongoing. No further information was immediately made available.