Serious Crash Unit investigator Jeff Cramp had earlier said the teens for some reason had ignored the 30km/h speed limit set by the road workers and reportedly were not wearing seatbelts when the crash happened.
A police spokesperson said they were now seeking anyone who witnessed the crash or was in the area before the crash, or had dash-camera footage to assist them with the investigation.
The vehicle involved in the crash was a blue Mazda sedan.
The public can call the police on phone number 105 quoting the file number: 231130/7436.
Information can also be provided anonymously via Crime Stoppers on 0800 555 111.
Avneesh Vincent is the crime and emergency services reporter at the Advocate. He was previously at the Gisborne Herald as the arts and environment reporter and is passionate about covering stories that can make a difference. He joined NZME in July 2023.