Police are appealing for information after the aggravated robbery of the Royal Heights PostShop in Massey in West Auckland yesterday morning.

Just after 9.30am, a person entered the shop on Royal Road and pointed a pistol at the woman working there, before running off with an amount of cash.

Several good samaritans gave chase and followed the suspect down a service lane between the Countdown and Mobil station and out onto Moire Road.

One of the good samaritans recovered an amount of cash dropped by the offender and returned the money to the PostShop before police arrived.

Police would like the person to come forward so they can thank him for his assistance and obtain further details about the robbery.

The offender has been described as Maori or Polynesian, medium to solid build, 6 foot tall [182cm] with a distinctive 5cm dark black birthmark or mole on their left cheekbone.

The suspect was wearing a grey hooded jacket, dark coloured shorts and black shoes.