Legal challenges mount in Kyrgyzstan as Kumtor potentially on the hook for $4.5 billion in claims.

The union said on Monday talks had gone nowhere and that it felt it had no choice but to walk out.

The group also forecasts that the mining sector will pay 17 billion soles in taxes on average each year from 2022 through 2026.

Negotiators asked labor authorities for a one-day extension in a mediation process.

Several mines in the world's top copper producer country are in the throes of tense labor negotiations.

He said the administration is committed to maintaining fiscal discipline and will reduce the deficit in 2022 by 1 percentage point compared with 2021.

Copper prices soared to record highs earlier this year, giving workers unions additional leverage in negotiations.

Several mines in world top copper producer Chile are in the throes of tense labor negotiations, including BHP's Escondida and Codelco's Andina at a time when supply is already tight.