A 38-year-old man was attacked after he tried to stop a robbery in the Loop Saturday night, Chicago police said.

The man attempted to prevent the theft around 8 p.m. in the 100 block of South State Street.

According to Chicago police, his face swelled, and he suffered a cut on the back of his neck in the attack.

He was taken to Northwestern Memorial Hospital in stable condition, according to police.

The alleged thief, a 22-year-old man, was taken into custody.

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