Multiple law enforcement officers and paramedics were at the scene of an officer-involved shooting involving Vallejo police in unicorporated Martinez, according to the Contra Costa County Sheriff's Office.
The shooting occurred near Pacheco Boulevard and Ellis Road, the sheriff's office said. Images show a vehicle off the side of the road at the scene, but it wasn't clear if it was involved in the shooting.
Witnesses reported hearing multiple gunshots.
Details on suspects and victims were not available.
The Vallejo Police Department was leading the investigation.