Police are appealing for witnesses to come forward with information about the fatal crash at Hukerenui on Sunday that claimed two lives.
Two people were killed after a four-wheel drive vehicle that was towing another car lost control, causing a car to swerve to miss it and crash into oncoming traffic.
Two passengers from the car that tried to miss the four-wheel drive died at the scene.
Northland Police Acting Road Policing Manager Senior Sergeant John Fagan said the fatal crash is a reminder to motorists to take more responsibility and care when travelling on our roads, especially when towing.
"The maximum speed you can tow another vehicle without a rigid towing system, [such as with a rope or a strop] is 50km/h," Mr Fagan said.
Police are interested in speaking to the occupants of a large green American-style car and another vehicle towing a large boat heading southbound on State Highway 1 around the time of the crash.
Police also want any other witnesses who may have seen the crash or a vehicle being towed by another vehicle on SH1 between Kawakawa and Hukerenui to come forward.
The names of the deceased had not been released by edition time yesterday, as police were still contacting the next of kin.
Those injured in the crash have been released from Whangarei Hospital and are recovering at home.
Anyone who has information on Sunday's fatal crash can contact the Whangarei Police on 09 430 4500.
The two deaths brought Northland's road toll so far for 2013 to seven.