Sgt. Robert Rosin tells the Oakland Tribune ( http://bit.ly/1fPY5Ep) that the teen and a 35-year-old man he knew were together outside the facility Saturday night when a gunman approached and shot them. The two were pronounced dead at the scene, and their identities haven't been released.
Rosin says no arrests have been made and a motive is not yet known.
Police responded to reports of gunshots around 10:45 p.m. No one was inside the Boys & Girls Club at the time, though a bullet hit a wall of the branch.
Police and Crime Stoppers of Oakland are offering up to $20,000 for information leading to an arrest. Those with tips are urged to call 510-238-3821 or 510-777-8572.