"Our basic government position is that we can sign an agreement with a duly-constituted government, whatever its political status," US Assistant Secretary of State Richard Boucher said in an interview to Outlook magazine.

He was responding when referred to External Affairs Minister Pranab Mukherjee's comment that a minority government ‘cannot, need not and should not sign a major agreement’ like the nuclear deal.

"As long as it is duly-constituted government of the country, we can sign a deal with it," Boucher said.

India and the US have concluded negotiations on the 123 Agreement for cooperation in civil nuclear field but are yet to sign it formally.

There have been questions as to whether the agreement can be signed if the Left parties, which are opposed to the deal, withdraw support to the minority Manmohan Singh government.

Asked whether Indian officials discussed the possibility of signing a deal with a minority or a caretaker government, Boucher said, "I don't remember it actually coming up at all during my meetings with Indian officials."