Manawatu Countdown supermarkets are reviewing their security measures after three stores were targeted within a week by armed robbers.
In the latest incident a disguised man, armed with a hammer robbed a Feilding store of cash about 9.45pm yesterday.
He was wearing a plain blue hoodie over his head and a scarf or bandana across his face.
After the robbery, the man fled towards Bailey and Denbigh streets, acting Detective Senior Sergeant David Thompson said.
"No one was hurt during the robbery but staff members were clearly shaken with what had occurred."