Whanganui Police are appealing to the public and retailers in their efforts to track down the armed man who robbed the St John Four Square Supermarket on Saturday night.
A quantity of cash was taken when the man, brandishing a weapon, went into the store just before 7.30pm on Saturday and demanded money.
At one stage he went behind the counter and thrust the barrel of his weapon into the stomach of store manager Vinod Meghwal before running from the store.
Police believe the man got into a small white hatchback car similar to a Mazda Familia or Toyota Corolla that had been parked in St Leonard St next to the store.
Mr Meghwal and another staff member were working in the store and there were three female customers when the robbery took place.