Tzu-Ta Ko was killed in the collision just after 7 a.m. Sunday at 19th and Harrison streets near Lake Merritt.
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Police have released photos of the Mini Cooper, which is tan or white.
Ko suffered severe head trauma in the collision and died at the scene following treatment by firefighters and paramedics, police said.
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An award of $10,000 is being offered by police for information leading to an arrest in the case.
Anyone who has seen the Mini Cooper or who has information about the case is asked to call the Police Department's traffic unit at (510) 777-8570.