The video, the contents of which have been described as evidence of a 'human rights catastrophe unfolding', shows two men from the Hongana Manyawa, a tribe in Halmahera, who live far from outsiders.

The tribespeople can be seen standing across the river assessing the situation. One of the two men, who are both holding spears, points in the direction of the vehicle and raises a machete above his head as he moves forwards.

He appears to prepare to launch the object towards the workers while the other man ducks. 

The bulldozer driver then revs up their machine in response, causing the men to flee