KIEV, Dec. 1 - Arcelor Mittal Kryviy Rih (formerly Kryvorizhstal), Ukraine's biggest steel producer, reported roll production down a preliminary 21.9% year-on-year to 5.094 million tons in January-November.

Crude steel production fell 19.8% to 5.967 million tons, pig iron - 18.7% to 5.383 million tons and sinter - 17% to 9.103 million tons, the company told Interfax.