Police are appealing for witnesses to a crash that occurred on West Coast Road, West Melton, Selwyn District on Sunday 2 June.
One person died following the two vehicle crash which occurred at around 9:50pm.
Another person was transported to hospital in a critical condition.
Police would like to speak to anyone who witnessed the crash or helped those at the scene following the crash.
Police are particularly interested in speaking to a woman, believed to be a nurse, who stopped and helped those involved in the crash.