Detectives are investigating after a grocery store was robbed by a man armed with a knife this evening.

A man entered the Brisbane Road store around 6.20pm, threatened the male attendant with a knife and demanded money.

After opening the till the 27-year-old attendant was ordered to the back of the store as the man removed a quantity of cash.

The man then left the store and was last seen running towards Braeside Street.

The attendant was not physically injured.

The man is described as being of Caucasian appearance, 175cm tall, average build and with blonde hair. He was wearing jeans, a black jumper, white baseball cap, black gloves and was carrying a black bag.