A man and woman are dead in an apparent murder-suicide discovered in unincorporated Pittsburg, the Contra Costa County sheriff’s office said Thursday.

A resident contacted the sheriff’s office around 9:30 a.m., saying it looked like two people had been shot inside a parked vehicle, the sheriff’s office said.

Officers went to Nortonville and Kirker Pass roads and found the man and woman dead at the scene. Both had been shot.

“Detectives say initially that this appears to be a murder-suicide,” the sheriff’s office said in a statement noting that the identities of the dead “are not being released at this time.”

The sheriff’s office is asking anyone with information in the case to call 925-646-2441 or 925-313-2600.

Anonymous messages can be left at 866-846-3592 or by email at tips@so.cccounty.us.

Nanette Asimov is a San Francisco Chronicle staff writer. Email: nasimov@sfchronicle.com Twitter:@NanetteAsimov