The shooting was reported a short time after 11 p.m. Friday in the 500 block of 105th Avenue, Oakland police Officer J. Moore said.
Officers arriving on the scene located three victims suffering from gunshot wounds.
One was pronounced dead at the scene and another later died at a hospital, Moore said.
A third victim remained hospitalized in critical condition this morning.
Moore said a fourth victim suffering from gunshot wounds took himself to the hospital in stable condition late Friday night.
No suspect information was available and no arrests had been made as of this morning.