PHILADELPHIA (CBS) — Authorities now say that it was an argument, not the so called “knockout game,” which triggered a fatal punch.

The incident was caught on camera in the city’s Lawncrest section. The punch sent 30-year-old Mardoqeo Sincal-Jochola stumbling to the ground.

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He died as a result of his injuries, shortly after.

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The incident happened Friday in the 700 block of Adams Avenue. Police are searching for the suspects.