Police have warned retailers about an "erratic and highly strung" offender who robbed a Whangarei dairy at gunpoint yesterday.
The man entered the Destination Dairy on Riverside Drive, Whangarei, about 4.25pm, presented a firearm and demanded money from the female shop attendant.
The shop attendant fled to a back room, and the armed man left taking the shop's cash register with him, police said.
He is believed to have left in a blue sedan parked behind the dairy.
The male was described by witnesses as being dark skinned, possibly Maori, approximately 1.85m tall, possibly aged in his 20s and wearing a hooded sweatshirt.