Police are appealing for public assistance following an armed robbery at a convenience store in Keysborough last month.

Investigators have been told a man gained entry to the locked Cheltenham Road store before covering his face on 12 December at about 11.12pm.

He was closely followed in by two other men.

Both men had their faces covered and were carrying a hammer, a knife and a crowbar when they approached the attendant.

One of the offenders jumped the counter and stole cash.

The attendant was not injured and the trio then fled the scene.

One of the males is described as aged between 16-18, with a slim build and perceived to be of Islander appearance.

At the time of the hold-up he was wearing gloves, a black hooded top with white writing written down both arms and on the front and back, black jeans and black runners.

His face was covered with a black and white bandana he was carrying a back pack.

The second offender is perceived to be Caucasian and had his face covered.

He was wearing black Adidas shorts with white stripes, a black hooded top, a black peaked cap and Adidas runners.

The third offender was wearing a black spray jacket, grey tee shirt, khaki green canvas runners, white socks, black Adidas track pants, one glove and a white face covering.

Detectives have released CCTV images of three men they believe may be able to assist with their enquiries.