Police are investigating after a man used a large knife during an armed robbery at a gaming venue in Elsternwick last month.

Armed Crime Squad detectives are investigating the armed robbery which took place at a Sandham Street gaming venue about 11.25pm on 7 June.

A man entered the venue wearing gloves, a scarf over his face and was wielding a large kitchen knife.

He approached the poker machine cashier counter and demanded the staff member hand over cash.

After the offender received an amount of cash he fled the venue.

Police have released CCTV footage of a man they wish to speak to in relation to the armed robbery.

The man was wearing a black hoodie, cream pants and dark shoes.