OAKLAND -- A 15-year-old boy and a 35-year-old man were shot to death in West Oakland Saturday night, police said Sunday.

Their names were not released by police. Investigators did say they both lived in the area of the shooting and knew each other.

Police responding to reports of gunfire about 10:45 p.m. Saturday found the two victims in the 900 block of 24th Street near Market Street and outside the Boys and Girls Club of Oakland branch. They were both pronounced dead at the scene.

Sgt. Robert Rosin said the two were hanging out together in the area when they were confronted on the street by someone and shot. One errant shot hit a wall at the Boys and Girls Club but no one was inside at the time, police said.

Rosin said police don't have a motive yet for the shooting and no arrests have been made.

Police and Crime Stoppers of Oakland are offering up to $20,000 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.

The two killings Saturday happened about a half-block from where two men were fatally shot on Dec. 28, 2012. In that shooting a 19-year-old El Sobrante man and his friend, a 21-year-old Oakland man, were killed outside a residence in the 800 block of Mead Avenue.

That case remains unsolved but police don't think it is connected to Saturday's slayings.

Oakland now has 11 homicides in 2014. Last year at this time there were eight homicides in Oakland.

Contact Harry Harris at 510-208-6443 and follow him at Twitter.com/HarryHarris15