Three huts on the Whanganui Journey Great Walk have been closed after a "bedbug attack" was reported.
The Whakahoro and Tīeke Huts will be temporarily closed for treatment while the John Coull Hut will remain closed for the rest of the season.
Department of Conservation director of heritage and visitors Steve Taylor said a "highly precautionary approach" was being taken, with the huts being treated as if they have an infestation. They would be closed and fumigated immediately.
Bedbugs had not previously been reported in huts along the Whanganui River, but this week's single report was from a "credible source", Taylor said.
"Consequently, we are treating this as an urgent matter and have responded immediately," he said.