OAKLAND — Two men were fatally shot Saturday night and Sunday morning in unrelated incidents while they were driving their cars in East Oakland, police said.

At 9:32 p.m. Saturday, a 42-year-old man was fatally wounded as he drove his car southbound in the 2600 block of Ritchie Street near Arroyo Viejo Park. He was identified as Marcus Irvin, who lived near where the shooting happened, authorities said.

Police said that as Irvin was driving someone on the street fired multiple shots at him. The car stopped on its own on a speed bump, and he was pronounced dead at the scene, authorities said. Sgt. Michael Cardoza said police have not determined a motive yet for the killing and that no suspects have been arrested.

At 2:46 a.m. Sunday a 34-year-old Oakland man was fatally shot while he drove his car in the 1400 block of 90th Avenue. His name was not released Sunday.

Officer Jason Turner said after the man was shot the car continued on to the 1600 block of 90th Avenue, where it struck some parked vehicles before stopping. The man was pronounced dead at the scene.

Police are not sure if the shooter was in another vehicle or on the street. Turner said police don’t have a motive yet and that no suspects have been identified.

Related Articles Two men wounded in Berkeley shooting

Pittsburg: Suspect identified in Sept. 17 homicide

Man fatally shot in Oakland Sunday is identified

Sketches of suspects released in San Pablo fatal shooting

Pleasant Hill: Pursuit ends with man shooting self, police say The killings are the 72nd and 73rd homicides investigated by Oakland police this year. There have been five homicides since Thursday night. Last year at this time police had investigated 80 homicides in the city.

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

Check back for updates.