“Sadly, one adult remains in a critical condition. Five other people are doing well and are stable, while another has been discharged from hospital.”
The two-vehicle crash took place on Cove Rd approximately 150m north of the intersection with Johnson Point Rd, at around 1.30pm on Wednesday.
Chamberlain said police are seeking any witnesses to the crash or driving prior, or any other information relating to the incident.
“In particular, we are seeking sightings of a silver-coloured Subaru that was travelling north on Cove Rd at the time of the crash,” he said.
Police would also like to speak to people with CCTV cameras on their property covering the Cove Rd area, south of Waipu township.
“And we ask anyone who might have recorded dash camera footage from the area to also come forward and assist the ongoing investigation.”
People with information can call police on 105 or contact them online, using the file number 240403/7326.