JAKARTA: Indian Metals and Ferro Alloys Ltd (IMFA) has filed a nearly $600 million claim against Indonesia in international court, alleging that overlapping mining permits have disrupted its operations, a government official said. The Permanent Court of Arbitration will hold a hearing on the case in Singapore on December 6, said Heriyanto, director for legal affairs at Indonesia’s mining ministry. “We are being sued for 7.7 trillion rupiah ($560 million) because they are unable to carry out production,” Heriyanto told reporters. “They are holding mining business permits but they cannot produce because they overlap with seven other permits in East Barito, Tabalong and South Barito.” IMFA officials were not immediately available for comment.