Police have confirmed that one person is dead, and two people are in a critical condition at a crash on SH1, Piarere.
The Serious Crash Unit are in attendance and investigating and the road will be closed for some time.
NZTA advise motorists to delay their journey or use an alternative route, detouring via SH29 and SH27 in both directions.
More information will be released when it becomes available.
Both lanes are blocked on SH1 in Piarere, South Waikato, between Horahora Road and Paparamu Road.
Two cars have collided at about 6.15pm and people are trapped in the vehicles.
Police and emergency services are in attendance and diversions are in place.