Mr Fairley said the incident had also been "very saddening" for hospital staff.
"The death has been referred to the coroner and, as such, Wairarapa DHB is not able to comment on this matter publicly."
Senior Sergeant Mike Sutton, of Masterton police, said police had attended an incident involving the man on the day before his death.
He confirmed the incident had not involved any offending.
Mr Sutton said police were carrying out internal enquiries into the incident, as well as investigating the death on behalf of the coroner.
He said it was a "sad" situation.
"The family had been asking a few questions as I would expect them to do in terms of trying to understand what has taken place."
One of the man's close friends said the family were understandably "distraught".
"We all feel pretty let down by the whole situation and we all want answers.
"We lost someone dear to us that day, and we don't want this to happen to anyone else."
The Health and Disability Commissioner could not confirm whether or not they had received any complaints regarding the death, as it was against their policy to comment on cases.
A spokesperson from Health Minister Jonathan Coleman's office said he was unable to comment while the investigations were underway.
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