Earlier this afternoon the Westpac Rescue Helicopter was on the scene at the intersection of Harleston and Broad Rds near Sefton in the Waimakariri District.
Several patients were being treated for their injuries after the crash happened shortly after 3.30pm, a spokesman for St John Ambulance said.
“I was just trying to get home and came across all this,” said one local man.
The Waimakariri District Council confirmed the crash was fatal in a social media post, saying the intersection would be reopened when the crash investigation was complete.