A person has died after a serious crash on Christchurch's northern motorway.
Emergency services responded to the crash on State Highway 1 just south of the Waimakariri River around midday today.
A spokesperson said the Serious Crash Unit had been examining the scene and police investigations into the cause of the crash are continuing.
"At this stage the road is still closed and access to the Northern Motorway should be done via Marshland Rd."
