"India is a big part of my plan," US President Barack Obama told Prime Minister Manmohan Singh Tuesday after he was congratulated for winning the presidential election.

Obama made the remark when the two met and shook hands briefly on the sidelines of the East Asia Summit in this Cambodian capital.

Separately, National Security Adviser Shivshankar Menon met his American counterpart Tom Donilon for 90 minutes, an Indian official said.