Two police officers, one of whom was off duty, were at scene of the stabbing at a Dunedin supermarket and were among those who stepped in, police say. The 42-year-old man accused of stabbing four people at a Dunedin supermarket was remanded in custody after he briefly appeared in the Dunedin District Court this afternoon to face four charges of attempted murder related to a stabbing attack at the Countdown supermarket on Cumberland Street yesterday. Among those attacked were two Countdown staff and a Corrections officer. Southern district commander Superintendent Paul Basham said two police officers, one of whom was off duty, were also at the supermarket at the time and stepped in to provide aid and support.