A police spokesperson said one person was moderately injured and four others suffered minor injuries.
NZ Transport Agency Waka Kotahi issued a social media alert about the incident yesterday evening, warning motorists to expect delays after a “serious incident”.
“A serious incident has been reported on SH1 north of Waiouru, near Tree Trunk Gorge Rd,” the alert said.
Maryana Garcia is a Hamilton-based reporter covering breaking news in Waikato. She previously wrote for the Rotorua Daily Post and Bay of Plenty Times.