A Walmart security guard was stabbed as he attempted to stop a shoplifter late Tuesday night.

The incident occurred just before 11:30 p.m. at the Walmart in the 1400 block of Austin Highway.

San Antonio police said the security guard was trying to stop the suspect -- identified Wednesday as Jared Louis Knighton -- when the man pulled out a box-cutter and stabbed the guard in the abdomen.

The guard was transported to University Hospital in serious condition.

Police said Knighton fled on foot to a nearby motel.

SAPD officers searched for Knighton but were unable to find him.

Knighton is considered to be a regular customer and now faces aggravated robbery charges.

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