Photo: heraldsun.com.au

Investigators have been told a man entered the store on Victoria Street just after 11am armed with a knife.

He then demanded cigarettes from the male attendant, before punching him in the head.

The offender then jumped the counter and took several packets of cigarettes before leaving.

The victim sustained a cut to the finger during the incident and the offender left the store in a southerly direction.

Detectives from Darebin Crime Investigation Unit are investigating and have released an image of a man they wish to speak to regarding the incident.

He is described as being in his late 20s, perceived to be of Caucasian appearance and with a slim build.

Anyone with any information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au