A crash on Auckland's motorway near a major junction has closed part of Spaghetti Junction and is expected to cause major traffic woes.
Three lanes of the Northern Motorway link to the port and North-western Motorway and a lane to the Southern Motorway have all been blocked in the lunchtime accident.
A Fire Service spokesman said the two-car crash was near the Fanshawe St off-ramp, and emergency personnel are working to free one person who is trapped.
A St John spokeswoman said one person is in a critical condition and is being taken to Auckland City Hospital, with another patient who has minor injuries.
A third patient who was injured is not being transferred to hospital, the spokeswoman said.
A Fire Service spokesman said the two-car crash was near the Fanshawe St off-ramp, and emergency personnel were working to free one person who is trapped.
According to NZ Transport Agency, the State Highway 1 link to SH16 towards the Ports of Auckland and westbound was closed, and motorists were advised to avoid the area or delay trips if possible.
In a statement, NZTA said motorists wanting to access the Northwestern Motorway should take State Highway 18 or exit at Fanshawe St.