Officers responded to the intersection of Delta Fair Boulevard and Buchanan Road, near the Delta Fair Shopping Center, on a report of shots fired. Upon arrival at the scene, police found numerous shell casings in the street and two adult male victims in a vehicle about a block away on Somersville Road.
Police said the two men were suffering from gunshot wounds when officers arrived.
One victim was pronounced dead at the scene and a second victim was transported to a nearby hospital in critical condition, police said.
The suspect vehicle was described as a gold four-door vehicle, possibly a Honda or a Chevy, police said.
The homicide remains under investigation and anyone with information is urged to contact Detective Meads at the Antioch Police Department at (925) 779-6884.