Police are hunting a man who robbed a Greymouth petrol station with a samurai sword in the early hours of this morning.
West Coast Police are investigating the aggravated robbery of Greymouth BP after the offender entered the petrol station about 3.15am wielding the sword.
They took an unknown amount of cash from the register then fled, heading along Tainui Road on foot, police said.
The offender was wearing a sweatshirt or jacket with light-coloured sleeves and a hood, and a black body. Both sleeves have writing down the length of the arms.
The person was also wearing dark coloured trousers and white shoes.