A 31-year-old man was arrested after assaulting a police officer on Auckland’s Karangahape Road over the weekend, RNZ reports. Police were dealing with a group who were fighting at about 3:30am, when a 31-year-old man who was not involved in the initial incident, came up and hit the officer from behind. Bystanders and security guards intervened to help the officer and catch the man. The police officer was hospitalised suffering a serious concussion and is in a stable condition.