OAKLAND -- The names of two people slain earlier this month have been released, but police still don't have motives in the fatal shootings nor is anyone in custody.

Olivia Muteba, 23, was sitting in a rental car in the 800 block of 100th Avenue with a 26-year-old male friend about 11:35 p.m. Aug. 15 when someone on foot opened fire on the car from outside before fleeing, police said.

She was pronounced dead at the scene. The man, whose name was not released, is expected to recover from his injuries, but his condition was not available Friday, police said.

Police don't have a motive yet, and no arrests have been made.

The following day in an unrelated incident, a 38-year-old Oakland resident, now identified as Pablo Armenta, was with about a dozen others at a birthday party outside a home in the 400 block of 105th Avenue in the Sobrante Park area when gunfire erupted.

Armenta was taken to the trauma center at Highland Hospital in Oakland, where he later died. Another man, whose name, age and city of residence have not been released by police, also was killed. Two other men, including a 52-year-old man who lived at the house, were wounded but they are expected to recover. The age of the other wounded man was not released and neither name was released.

Police and Crime Stoppers of Oakland are offering as much as $30,000 in reward money for information leading to the arrest of a suspect or suspects in the birthday party shootings. As much as $15,000 in reward money is being offered for information in the killing of Muteba and the wounding of the other man. Anyone with information may call police at 510-238-3821 or a tip line at 510-773-2805.

Follow Kristin J. Bender at Twitter.com/kjbender.