RAPID CITY, S.D. (AP) — A fight at a Rapid City casino has left one man critically injured.

Police say the assault happened during an argument between two men Tuesday afternoon at the Hideaway Casino on North Lacrosse Street.

The victim, a 46-year-old man from Rapid City, allegedly hit his head on at ATM machine after he was punched by the other men.

Authorities say the two men appeared to know each other. The suspect fled the casino.

Police say they hope to review security footage from the casino.