WHITEHALL TOWNSHIP, Pa. (WPVI) -- A man was violently attacked Monday evening at the Lehigh Valley Mall in Whitehall Township after stepping in to defend a security guard who was being harassed by a group of teenagers, according to the victim and local police.

Bob Minnich said he was shopping with his family when he witnessed a group of unruly teens taunting an older security guard while others recorded the incident on their phones.

"Eventually, I saw everyone watching, and I chose not to be a bystander any longer," Minnich said.

After asking the teens to leave the guard alone, Minnich said the group - estimated to be about 10 young men - began to beat him near a jeweler's kiosk.

"One of them lunged at me. They got a hold of me, slammed me into the jeweler's counter, broke a shelf on

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