Police on the West Coast are investigating 1080 activists who delivered a warning letter to a number of organisations this week in light of planned 1080 drops across the area.
The warning letter has raised concern with local police as the writers have suggested anybody involved or associated with the 1080 programme is committing an act of terrorism.
West Coast Area Commander Inspector Mel Aitken said the 1080 programme was lawful.
"The belief that anybody associated with this is committing an act of terrorism is absolutely incorrect," he said.
"While all people have the right to freedom of speech as well as peaceful protest, I wish to make it clear that threats made towards individuals or organisations that are involved in the 1080 programme will be treated seriously.