Czech 70% state-owned power company CEZ AS (BAACEZ.PR) Thursday said it may sell two of its yet-to-be-modernized lignite-fired power plants amid uncertainty of coal supplies for the generators and on concerns the dirty plants will have trouble meeting new carbon emissions rules.

CEZ has prepared documents so prospective bidders can review the operational and contractual data of the Pocerady and Chvaletice power plants.

Czech closely held companies Energeticky a Prumyslovy Holding, or EPH, and Czech Coal AS have already expressed interest in bidding for both plants, CEZ said.

The Pocerady plant has an installed capacity of 1,000 megawatts while the Chvaletice plant has a capacity of 800 megawatts.

Both plants need upgrades to meet the European Union's carbon emission reductions targets as of 2016, and the plants must also secure coal supply contracts, CEZ said.