OAKLAND — A 21-year-old man was in grave condition after he was shot Saturday morning in East Oakland, authorities said.

The shooting happened about 8:44 a.m. in the 10200 block of International Boulevard.

Police say the man, an Oakland resident, was shot by someone who approached him on the street. The man was taken to a hospital.

Police have not yet determined a motive or announced an arrest.

Police and Crime Stoppers of Oakland are offering up to $10,000 in reward money for information leading to the arrest of the suspect.

Anyone with information may call police at 510-238-3821 or Crime Stoppers at 510-777-8572.

Staff writer Shomik Mukherjee contributed reporting.