Two people, including a child, are critically injured after a four-car crash and seven others also have injuries.
Emergency services were called to a four-car crash on Auckland's Dominion Rd and the intersection of Milton Rd, on Friday evening.
Three people were moderately injured and two people with critical injuries were taken to Auckland City Hospital's emergency department.
Four other people have minor injuries and a child has been taken to Auckland Starship Hospital with critical injuries.
At the scene, a St John shift supervisor said the crash was a major incident.
A helicopter emergency medicine service team had been deployed, he said.
The crash involved three trapped people and emergency services took the the roofs of cars off to extricate them safely, he said.
A few people in the crash had gotten out of their cars and were walking around, and were later discharged by St John, he said.
A Fire and Emergency NZ spokesman said fire fighters had freed three people who had been trapped in their cars.
Three fire trucks had been sent to the crash around 7.30pm, he said.
A St John spokeswoman said five people were taken to Auckland City Hospital's emergency department.
Two people had critical injuries and three people were moderately injured, she said.
Four other people received minor injuries and did not go to hospital, she said.
St John sent six vehicles to the scene at 7.29pm, she said.
A witness at the scene said Dominion Rd was blocked both ways and diversions were in place.
It looked as though four cars were involved in the crash which was on the right-hand side of the road, the witness said.
"It's a mess," he said.
There were a lot of police cars, fire engines and onlookers in the area, the witness said.
Another witness at the scene said a car had been "torn in half".
Dominion Rd is a 7.3 kilometre arterial road in Auckland and a popular transport route.
The road is closed and motorists are advised to avoid the area.
The Serious Crash Unit have been advised.