Police have appealed for sightings of a car after two more people were arrested in connection with a "cowardly and vicious" attack on an elderly man at a business in Wellington.

Police were called to Philip Moore & Co on Abel Smith St after three people burst into the cleaning business and threatened two people inside with weapons, including a gun, about 3.40pm on Sunday, November 4.

A fourth suspect was believed to have been outside. The group stole cash, property and a van, police said.

Detective Inspector Paul Basham this afternoon said police wanted to hear from anyone who has seen a dark coloured BMW car, registration DSC590.

The public should not approach the vehicle and call police.

Mr Basham said four people had now been arrested in connection with the armed attack.

A 57-year-old woman was arrested and charged with conspiracy to commit aggravated robbery and kidnapping after police raided a home in Evans Bay on Saturday morning. She is scheduled to appear in Wellington District Court today.

On Friday a 26-year-old man was charged with aggravated robbery and kidnapping. More charges were likely, Mr Basham said.

The arrests come after police - including armed offenders squad officers - raided a home in Lower Hutt on Thursday.

A 25-year-old man and a 22-year-old woman were arrested and charged with aggravated robbery, kidnapping and possession of cannabis for supply.

Police found a double-barrelled sawn-off shotgun with ammunition during the raid, along with two other weapons, a quantity of cannabis packaged for sale and stolen property from the cleaning business.

Anyone with information about the incident should phone Wellington police on (04) 381 2000 or Crimestoppers on 0800 555 111.

- © Fairfax NZ News