The Ramu nickel and cobalt mine in Papua New Guinea was shut this week by its Chinese owners after it was attacked by villagers on Monday, according to media reports.
The mine, forecast to produce 22,000 tonnes of nickel in 2014, is operated by Ramu NiCo, which is majority owned and run by Metallurgical Corporation of China Ltd
Ramu NiCo said equipment, including computers, printers, and phones, "costing millions of kina" were badly damaged or removed from its office, according to The Australian newspaper.
One local report said preliminary investigations found the attacks were spurred by concerns about the company's hiring policies for mine workers, while Ramu NiCo has been focusing on training locals to be able to work at the mine.
Minority owner Highlands Pacific's top executives and a spokesman were not immediately available to comment on the situation at the mine.