Kazakh copper producer Kaz Minerals says a fire occurred overnight at its Bozshakol project in northern Kazakhstan and has since been extinguished.
The company said the incident occurred late on August 13, and that it had yet to assess the extent of damage.
No injuries were reported at the under-construction project.
The miner started pre-production mining at the site in June and commissioning was expected in the fourth quarter of the year.
The project is expected to have a capacity 25 million tons of ore per year.