"Police are continuing their scene examination at the address today and post-mortems are likely to be completed tomorrow," he said.
"Police say that, based on current information, they do not believe the deaths of the elderly couple are suspicious and no one else is being sought in relation to the matter."
Forensic scientists entered the house mid-afternoon and police guarded the scene yesterday.
Neighbours of the couple told the Otago Daily Times the news stunned them.
"They couldn't be more [in love]," the neighbour said, adding that the pair were "lovely people" and "just a gorgeous couple".
The couple celebrated their 60th wedding anniversary in November 2012 after marrying at Yarrow Kirk in Selkirk, Scotland, in 1952.
Another neighbour regularly saw the man tending his garden, which he was very proud of.
"You couldn't have wished for better neighbours," she said.
Another neighbour said he also had not seen the couple since Christmas.
"They were really nice people."
- additional reporting, Otago Daily Times