OAKLAND -- A 44-year-old woman was fatally shot Monday night at an East Oakland apartment complex, police said.

She was later identified as Elizabeth keller. Police said she did not live at the apartment but in another area of Oakland.

Police responding to residents' calls and Shotspotter notification found the woman at 9:46 p.m. Monday at the apartment building in the 1400 block of 88th Avenue. She was pronounced dead at the scene.

Officer Nick Calonge said Tuesday police don't have a motive yet for the killing and are not sure what Keller was doing at the apartment. He said so far no residents of the complex have said they know her.

Police are not sure if she was shot at from a car or by someone on the street.

The killing was Oakland's 15th homicide of the year. Last year at this time, there were nine homicides in Oakland.

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