SOUTH SAN FRANCISCO, Calif. (AP) — A man has been arrested after police say he repeatedly struck another man with a steel weightlifting bar at a San Francisco Bay Area gym, killing him.

Forty-six-year-old Kenneth Osaka was being held without bail in the attack Wednesday night at a Bally Total Fitness gym in South San Francisco.

Police say Osaka took a solid steel bar used to lift weights and hit the victim in the head several times and then left the scene. Police didn’t release the name of the victim, who died at San Francisco General Hospital.

They also did not disclose a possible motive for the attack.

It wasn’t immediately clear whether Osaka had an attorney. He was arrested Thursday by police and a special agent with the U.S. Department of Homeland Security.

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