For unknown reasons, a white GMC Sierra drove into a semi-trailer truck.

One person suffers serious injuries in car crash on US 24 at Saint Stephens Drive in Orinda

Contra Costa, California. – One person was seriously injured in a two-vehicle collision on Highway 24 in Orinda, Contra Costa County, on Tuesday evening.

According to the California Highway Patrol, the accident was reported around 5:25 p.m. on westbound State Route 24 east of Saint Stephens Drive.

For unknown reasons, a white GMC Sierra drove into a semi-trailer truck.

One person suffered serious injuries to his left arm and was taken to John Muir Walnut Creek Hospital for treatment.

Further details about the accident were not disclosed.

An investigation is ongoing.