The identities of two women who deliberately jumped in front of traffic and caused injuries to several people, including one pregnant woman and children, are yet to be established by police.
The women were spotted by members of the public jumping onto State Highway 1 north of Warkworth last Thursday about 8.20pm.
The pair sprung into the path of cars travelling north, outside Sheepworld, prompting a driver to swerve and cross the centreline.
The motorist crashed into a car travelling in the opposite direction.
Police said all seven people in the vehicles, including a pregnant woman, were taken to Auckland City Hospital.