Dunedin police are investigating whether clothes found near a river in Otago belong to a missing American tramper.
The 20-year-old was tramping with other overseas students in Mount Aspiring National Park, but she became separated on the track.
She was last seen on Saturday afternoon in poor weather conditions and is carrying food, a sleeping bag and clothes but no map, locator beacon or tent.
Items of clothing have been found near the Young River but police have yet to establish whether they belong to the missing woman.
The search will resume tomorrow.