Two people are reported to be in a critical condition following a serious two-vehicle crash in Canterbury.
A further two people have minor injuries.
Police said emergency services, including a helicopter, were responding to the crash involving a truck and a car at Greta Valley on State Highway 1.
UPDATE: 11:25AM
— Waka Kotahi NZTA Canterbury & West Coast (@WakaKotahiCWC) February 11, 2024
Due to a serious crash, SH1 is now CLOSED between Omihi and Greta Valley. Road users are advised to follow directions of emergency services, delay their journey, or consider an alternative route if possible. ^JP https://t.co/ZMGRQKw8HK pic.twitter.com/uyrD7aBhk4
The road was blocked and diversions were in place at Waipara and Greta Valley.
Motorists have been advised to expect delays and to avoid the area.