Two people seen digging in a Wellington park under the cover of darkness have raised the suspicions of police who are investigating the behaviour.
There have been reports two people were digging in a section of the park above the entrance of the Terrace Tunnel in Wellington.
The area is accessed off The Terrace and is commonly used by people to exercise their dogs.
Police say the pair were seen around 5pm yesterday and possibly on other occasions too.
Officers found an area which had been damaged by being dug up and also found two shovels hidden in nearby bushes.
Anyone with information should call Detective Sergeant Dean Herd of Wellington police on (04) 381 2000 or anonymously via Crimestoppers on 0800 555 111.