Police are looking for a man they describe as having a distinctive look, after the robbery of Star Video Store in Wairakei Road, Christchurch, at about 2.45pm this afternoon.
They say he entered the store and demanded money while threatening the staff member with an item concealed under his top.
He fled with an undisclosed sum of money.
Police say the man is Maori, in his mid to late twenties, of average build, with distinctive orange coloured hair.
He was wearing a cap and three-quarter length shorts with white shoes.