The woman was in a critical condition and placed in intensive care at Whangarei. Around noon yesterday she was transferred by helicopter to Auckland City Hospital. The girl, who was initially in a serious condition, was transferred by road to Starship Hospital on Saturday.
The man and the other child were initially taken by ambulance to Bay of Islands Hospital in Kawakawa. Their injuries were initially described as moderate.
Further information on the patients' condition was not available yesterday.
Among the first on the scene were two St John ambulance volunteers. One had heard the crash from her workplace at Westmount College; the other was driving south on SH10 when she saw the collision a few hundred metres ahead.
The highway was closed for several hours between the Kerikeri crossroads and Waimate North Rd while medics tended to the injured and a specialist investigator from the police Serious Crash Unit examined the scene.
Sergeant Ross Laurie, of Kerikeri police, said the cause of the crash was still under investigation, but it appeared one driver had lost control and crossed the centreline.