The Waihi man whose body was recovered from the Waikato River in Huntly on Saturday has been identified as 34-year-old Stephen Marc Tobin.
Mystery surrounds how Mr Tobin came to be in the river.
Hamilton CIB Detective Senior Sergeant Daryl Smith told the Bay of Plenty Times there had been no reports of Mr Tobin having gone missing or prior searches of the river before a member of the public came across the body and alerted police.
Mr Smith said police were now working to establish the circumstances of how Mr Tobin came to be in the river and the investigation was still in its "very early" stages.
"Police wish to express their condolences to the family of Mr Tobin," he said.