One person is dead following a fiery crash on State Highway 1, north of Atiamuri.
Emergency services were called to the scene of the crash, near the Bull Ring Cafe, at 2.30am.
A police spokesperson says a car and a truck were involved in the crash, both vehicles caught fire.
"At this point, at least one person has been confirmed dead, however emergency services are still working to separate the crashed vehicles.
"Emergency services will be working at the complex scene for some time."
Northbound traffic is being diverted west onto SH30 at Atiamuri to Whakamaru, then north on SH32 back to Tokoroa. Signage is being arranged at Tokoroa for southbound traffic using the same route.
Southbound traffic on SH30 from Rotorua is being diverted north to Tokoroa then west and south on 32 & 30, back to Atiamuri.
SH1 ATIAMURI - ROAD CLOSED - 6:00AM— NZTA Waikato/BoP (@NZTAWaiBoP) November 12, 2018
Due to an earlier serious crash #SH1 will be CLOSED for some time between SH30 (south of Kinleith) & SH30 at Atiamuri. Southbound traffic detours from Tokoroa. Allow extra time: https://t.co/jhqjjPOUIq ^TP pic.twitter.com/5saeiTCMME