An ambulance rushed one of the victims to the hospital after gunfire broke out on Desanie Circle near Harvey Way in unincorporated Contra Costa County.
The shooting happened just before 6 p.m. in a residential cul-de-sac.
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The conditions of the victims have not been released.
Sheriff's investigators did not share information about the suspect or suspects.
Stay with ABC7 News for the latest details on this developing story.