An Otago Regional Rescue Helicopter, police and firefighters attended the scene at the Portobello Village Tourist Park, on Otago Peninsula, on Thursday evening, after the man and woman were overcome by lpg fumes.
The case is under investigation by the CIB but Detective Sergeant Dave Nelson, of Dunedin, declined a request for an interview yesterday.
However, the pair had both been discharged from hospital and inquiries were ongoing, Det Sgt Nelson said through a media spokeswoman.
He also said there was no link between the incident and a crash that same evening, in which a four-wheel-drive ended up on the rocks off Portobello Rd, near Vauxhall.
Portobello Station Deputy Chief Fire Officer Jamie Ramsay said his volunteer brigade attended the lpg incident but he declined to comment.
A Portobello Village Tourist Park manager, who did not give her name, described the incident as a ''personal event'' and was reluctant to comment further out of respect for the privacy of the pair.
''There's not much that we want to add to anything.
''There are issues that happen in the kind of environment that we have ... There's all sorts of things that go on from time to time. Most of it is personal to the people and we respect their privacy.''
