Papua New Guinea (PNG) said last month it would take control of the lucrative but troubled mine in the remote highlands region, citing environmental and social problems.

Barrick, which operates the mine in a joint venture with China’s Zijin Mining, suspended operations and launched a court challenge to the decision, vowing to pursue “all legal avenues” for recourse.

PNG’s National Court is considering whether to allow the case to proceed.

“The court case went through all the substantive matters. They reserved the decision for June 3rd,” Jerry Garry, head of the country’s Mineral Resources Authority told Reuters.

It was not clear whether a refusal to allow the challenge to go ahead would exhaust Barrick’s legal avenues.

Barrick (Niugini) Ltd, which manages the joint venture with Zijin directed Reuters to the company’s external lawyer, Derek Wood, who had no immediate comment on the matter.

Human rights organisations and some locals have advocated for the mine’s closure due to social unrest and pollution.

Barrick has said the move by the government is tantamount to nationalisation and that it has always abided by the country’s environmental regulations.

The miner cut its 2020 production guidance after encountering conflict with the government of Papua New Guinea.

The world’s second-largest gold producer now expects to produce between 4.6 million and 5 million ounces of gold this year — 200,000 ounces lower than its previous estimate.