Washington (Agencies): In a bid to maintain momentum built during President Barack Obama’s India visit, a string of high level visits are expected ahead of the April round of strategic dialogue between India and the US in New Delhi.

The dialogue headed by Indian External Affairs Minister SM Krishna and US Secretary of State Hillary Clinton will include several cabinet ministers with a separate Department of Homeland Security dialogue focusing on counter-terrorism, according to diplomatic sources.

US Deputy Secretary for Homeland Security, Jane Holl Lute was in New Delhi recently in preparation of an April visit by Secretary, Janet Napolitano for the extended dialogue to include Homeland Security.

As part of the preparatory visits, Indian Foreign Secretary Nirupama Rao would be in Washington February 13-15 close on the heels of last week's visit of National Security Advisor Shivshankar Menon, who met Obama his National Security Advisor Tom Donilon, Clinton and Under Secretary of State Bill Burns.

Noting the easing of US export controls on Indian defence and space organisations as promised by Obama, sources said besides a review of bilateral ties Nirupama Rao’s visit would draw a road map to India's membership in the four major international non-proliferation groupings - Nuclear Suppliers Group, Missile Technology Control Regime, Wassenaar, and the Australia Group.

Before that the US Commerce Secretary Gary Locke would be in India February 6-11 leading 24 US businesses on a high-tech trade mission focusing on advanced industrial sectors, civil-nuclear trade, defence and security, civil aviation, and information and communication technologies.