KIEV, May 6 - Arcelor Mittal Kryviy Rih (formerly Kryvorizhstal), Ukraine's biggest steel producer, reduced roll production tentatively 2.6% year-on-year to 2.335 million tons in January-April, the company told Interfax.

Crude steel production fell 5.6% to 2.614 million tons, pig iron - 5.5% to 2.333 million tons and sinter - 7.2% to 3.787 million tons in the quarter.