A Hato Hone St John spokesperson said ambulances responded to an incident on Hampton Downs Rd at about 5am.
“The incident was attended by one first response unit, one ambulance, two rapid response units and one road manager.”
Cordons have since been removed and the road reopened.
Police are appealing for information from anyone who was travelling in the Hampton Downs area between 10pm on Sunday, October 13 and 1am on Monday, October 14. This includes any dashcam footage.
Police said: “If you have any information that could help our inquiries, please update us online now or call 105.
“Please use the reference number 241014/2225. Information can also be provided anonymously via Crime Stoppers on 0800 555 111.”
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.
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