A tour group riding quad bikes in a remote area of the Otago high country didn't have permission from the land owner where a fatal crash took place on Saturday.
Two people died at the scene after the crash, which took place in the Kakanui Range east of Ranfurly.
Dome Hills Station owner David Douglas told the Otago Daily Times that he was unaware the group was operating on his land, and that they had not sought permission.
Both Mr Douglas and police have refused to reveal the name of the tour company involved.
Mr Douglas said he was not sure if a fence had been cut or a gate opened in order for the group to get into his property, but said he is looking into it.
He described the area where the accident took place as very rough country where only experienced riders should be.
Police say the crash was reported about 4.30pm and it's understood about eight people were riding in the group.
Police have refused to say whether those killed are New Zealanders or whether anyone has been arrested.
The bodies are being formally identified and WorkSafe is investigating.