OAKLAND -- A man fatally shot Monday night while sitting in a parked car in East Oakland was identified by police Tuesday as Robert Haynes, 29, of Antioch.

Haynes was shot about 7:12 p.m. Monday as he sat in a rental car parked in the 2600 block of International Boulevard, not far from the Fruitvale district. He was pronounced dead at the scene.

The shooter escaped in a car.

Police said Haynes used to live in Oakland and frequently visited the area where the shooting happened. He still had family and friends living in Oakland, and some showed up at the site of the shooting, police said.

Officer Jason Andersen said Tuesday that police have not determined the motive for the shooting.

The killing was Oakland's 31st homicide of the year. Last year at this time there had been 39 homicides in Oakland.

Police and Crime Stoppers of Oakland are offering up to $10,000 in reward money for information leading to the killer's arrest. Anyone with information may call police at 510-238-3821 or Crime Stoppers at 510-777-8572.