Customer assaulted, security guard threatened while trying to stop thieves at Kwinana liquor store

A customer has been assaulted and a security guard threatened while trying to stop two alleged thieves at a Kwinana liquor store.

It is alleged two men entered the Dan Murphy's store on Challenger Avenue around 6.25pm on Tuesday and selected various cans of pre-mixed alcohol before attempting to leave the store without paying.

A security guard confronted the men at the front of the store before one of the offenders allegedly grabbed a bottle of alcohol and threatened to hit the guard with it.

A customer, who had just entered the store, tried to help the security guard but was allegedly hit in the face, leaving him with a chipped tooth.

Police were able to arrest one of the men a short time later.

The 29-year-old Kelmscott man will appear in the Rockingham Magistrates Court today.

The second man is still at large.

Anyone with information is asked to contact Crime Stoppers on 1800 333 000.