US Deputy Assistant Secretary for South Asia Atul Keshap arrived here on Saturday on a four-day official visit to discuss bilateral issues and regional matters.During his visit, Keshap will meet with the ‘national leadership’, civil society leaders and private sector representatives to discuss a wide range issues, including bilateral relations, labour, development, governance and trade, said a US Embassy press release.Keshap is a United States foreign service officer from Virginia.As the deputy assistant secretary, Keshap works closely with Assistant Secretary of State for South and Central Asia Nisha Biswal to coordinate the US government policy towards this diverse and strategic region of almost 1.5 billion people and over $2 trillion in economic output.