Police report the crash involved a truck and two cars, the incident taking place at 4.50pm today. Several people have received moderate to minor injuries.
The NZ Transport Agency report the incident took place at the intersection with SH1 and Beach Rd and emergency services are currently on site.
The NZ Transport Agency is asking motorists to expect significant delays and to consider delaying their journey.
Elsewhere, a fallen tree on State Highway 1 near Kaiapoi temporarily forced the closure of southbound lanes this afternoon.
Both southbound lanes have been reopened but congestion remains in the area and motorists are being told to expect delays.
SH1 PAEKĀKĀRIKI, SOUTHBOUND – CRASH - 5:10PM Due to a crash at the intersection with Beach Rd, the road is CLOSED. Emergency services are on site. Please expect significant #delays or consider delaying your journey if possible. ^CR pic.twitter.com/s5Z9vWHWPk