The Russian companies have shown keen interest to invest in different sectors of national economy including oil and gas exploration, mineral, infrastructure development and communications. Besides, a Russian company Tyazhpromexport which had established the Pakistan Still Mills is now offering its services to upgrade and expand the mill to make it a profit oriented, said Saleem Mandviwala, while addressing a post Russian visit press conference here on Wednesday. Minister of State and Chairman Board of Investment (BoI) informed the journalists that after a gape of 25 years the two countries have restored economic relations. RusAI, world’s biggest aluminum producer, has showed interest in exploring aluminum in Khushab which is bestowed with extensive aluminum reservoir and with the investment in natural resources Pakistan can meet the domestic requirements, he added.