Updated at 9:47 pm on 8 May 2012
Concerns are mounting for the safety of a Dunedin tramper missing in the remote Ahuriri Valley in North Otago.
David Charles Palmer, 53, went into the area for what was thought to be a half-day tramp on Saturday.
On Tuesday, 50 police and search and rescue volunteers covered about 200 square kilometres of rugged terrain in the Birchwood area but failed to find him.
Police say they are concerned for Mr Palmer's safety as he is a diabetic and may have become disorientated.
They say Mr Palmer's family have described him as an experienced tramper and remain hopeful that he will be found safe and well.
Conditions on Tuesday were overcast with some rain, but temperatures have been dropping below freezing overnight.
The search has been suspended and will resume with the help of an Air Force helicopter at first light on Wednesday.
Listen to Tony Woodbridge on Checkpoint
Copyright © 2012, Radio New Zealand
Audio is categorised based on the frequency of the programme it was heard in. Click on the headings below to access the programmes. For the most recently published audio, go to the latest audio page.
Streams are in Windows Media format. Mac and Linux users may need to install additional software. Get help with audio
A selection of music interviews, reviews, videos, concerts, sessions, and performances.
Downloads and podcasts are available for selected programmes. Our podcast page has a complete list of feeds.
Help on using online audio: formats, software, podcasts, downloading, and troubleshooting.