KRYVY RIH, June 11 - Arcelor Mittal, the world's largest steel firm, is to invest $1.5 billion in the coming four years in the reconstruction of the Mittal Steel Kryviy Rih steel mill, mill General Director Narendra Chaudhary told reporters.

Loans from the European Bank for Reconstruction and Development will account for a relatively small share in overall investment, he said.