A man has been arrested after 4 people were injured in a knife attack in a Countdown supermarket in the city of Dunedin on New Zealand’s South Island yesterday. Police said they believe it was a “random attack” rather than a domestic terror event, and there are no other suspects. Authorities confirmed 3 of the victims are in hospital in critical condition. Southern District Police Commander Superintendent Paul Basham praised the actions of bystanders who “acted heroically to try and prevent this offender from causing any more serious harm”. Countdown, Woolworths’ Kiwi supermarket chain, said it was concerned about increasing violence towards its employees. The alleged attacker has not been named, and he is due to appear in court today.