China's Zijin Mining said one of its mines in Tibet has halted operations after an accident left six subcontractor employees missing, reported Reuters.
Contact with the workers was lost when a lift cage fell during construction of shafts in the drainage system of the Julong copper-polymetallic mine, Zijin said in a statement.
"Search and rescue operations for the missing personnel are underway in full force," the miner said.
The mine is operated by Tibet Julong Copper, a subsidiary in which Zijin holds a 50.1% stake. Julong Copper produced 115,000 tonnes of copper in 2022 and planned to produce 152,000 tonnes in 2023.