OAKLAND -- The city's homicide tally for 2013 is now eight after a man who was shot multiple times in 2009 in East Oakland died last month after suffering a relapse, authorities said.

The death of Damario Moore, 24, is considered a 2013 homicide because the Alameda County Coroner's Office determined he died as a result of complications from the 2009 gunshot wounds, authorities said.

Moore, then 21, was shot multiple times during a drive-by that happened about 2:45 p.m. Nov. 27, 2009, in the 9800 block of Bernhardt Drive, just north of I-880 in the Brookfield Village area, Officer Rob Rosin said Monday.

No motive was given for the shooting, and no arrests were ever made.

Police said Moore was hospitalized for a period but was later released.

Because of relapses, including infections, he was hospitalized on other occasions, the most recent five months ago at Stanford Hospital, authorities said. He died there Jan. 23.

The Santa Clara County Coroner's Office was going to do an autopsy. But when a pathologist there reviewed the medical records and realized the death could be the result of the earlier gunshot wounds, Moore was transferred to the Alameda County Coroner's Office for an autopsy.

The autopsy was completed, and on Jan. 30 a pathologist ruled Moore's death resulted from complications from the 2009 shootings, authorities said.

Rosin said the case is now a homicide investigation.

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 a tip line at 510-7732805.

At this time last year, there were 13 homicides in Oakland.