A badly damaged van left straddling a lane on East Coast Rd following last night's crash. Photo / Hayden Woodward
St John ambulance said 10 vehicles attended the incident.
Five patients were treated and taken to Auckland City and North Shore hospitals.
Two people were in a critical condition, one was serious, another had moderate injuries and a fifth suffered minor injuries.
Fire and Emergency NZ northern shift manager Colin Underdown said firefighters had to extricate two trapped motorists from wreckage of the one of the vehicles.