Alden Williams/Stuff A group of males presented a knife and stole cash from a man on Pipitea St in Wellington. (File photo) A 20-year-old man has been arrested in connection to an aggravated robbery involving a knife in central Wellington. On February 2, a man was approached by three unknown people while he was sitting in his silver BMW on Pipitea St in Thorndon at 3.40pm. One of the people presented a knife and the group allegedly stole a small amount of cash and property from the man. They ran into the Thorndon New World car park where they got into a silver Nissan Primera on the upper level and fled the scene via Molesworth St. Detective Sergeant Steve Wescott said police inquiries led to the vehicle, which he said was registered to Nomad gang associates.