Waitakere Police are investigating an armed robbery at The Warehouse in Lincoln Road Henderson overnight.

At about 12.30am a staff member who was leaving The Warehouse was approached by two men in the carpark outside. One of the men was armed with a handgun, say police.

"The staff member was forced to take the men into the office and open the safe.

"They took a quantity of cash from the safe and left in a silver sedan car with a registration number commencing with X.

Police say one of the robbers is described as about 165 cms (5ft6) tall Medium to fat build.

He was wearing: A black hooded jumper with a red pattern on the front. A sleeveless orange vest with silver markings, Black gloves, Full length black pants. The victim was not hurt in the incident.