The victim of a suspicious death on a Nelson boat was a man of European descent, police say.
However, police would not release any further details of who he was or how he died during a media briefing this afternoon.
Detective Inspector Paul Borrell, Tasman District crime manager, briefed media near the site of the incident.
He said they would not release the man's name until a post-mortem examination is completed Saturday afternoon.
"The death is being treated as suspicious but we are yet to establish if this is a homicide.