By: KDKA-TV News Staff

PITTSBURGH (KDKA) – More details have emerged about the death of a man who collapsed on a Port Authority bus.

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The man, 55-year-old Wilbert Davis, died on Saturday in the Hill District.

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A Port Authority Police officer arrived five minutes after getting the call and performed CPR as well as used a defibrillator but to no avail.

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The medical examiner has not released the cause of death.