The F-35 is the Pentagon's costliest weapons procurement program. - Reuters (File Photo)

WASHINGTON: The United States expressed interest on Wednesday in selling its most sophisticated fighter to India, just six months after New Delhi rejected two older US warplanes in a competition for an dollar 11 billion contract.

The US Defence Department, in a report to Congress on US -India security cooperation, said if New Delhi indicated an interest in Lockheed Martin's F-35 Joint Strike Fighter, the Pentagon would be willing to provide information on the aircraft's security and infrastructure requirements.

“The F-35 is something that we would be more than willing to talk to the government of India about should they request to find out more information about purchasing it,” said Robert Scher, deputy assistant secretary of defense for South Asia.

The F-35 is the Pentagon's costliest weapons procurement program.

The radar-evading aircraft is being developed with eight international partners and officials estimate it will cost dollar 382 billion for 2,447 of the jets for the US military.

India has not shown a particular interest in the program.

When US officials have indicated openness to Indian participation in the past, Indian officials have indicated they were not interested due to the cost and efforts to develop their own stealthy aircraft.

New Delhi rejected two older US aircraft - the F-16 and the F-18 - in a bidding contest in April for a dollar 11 billion jet fighter contract. India shortlisted European defense firms Dassault and Eurofighter for the contract for 126 jet fighters.

Scher said the inclusion of the F-35 offer in the report was not prompted by any signals from New Delhi but was intended as “an example of the high regard” the United States had for bilateral ties and India's military modernization effort.

The nine-page Pentagon report said the Defence Department was continually looking for ways to expand defense cooperation with India, including joint development of arms as the military-to-military relationship matures.

“We are seeking opportunities for increased science and technology cooperation that may lead to co-development opportunities with India as a partner,” the report said, noting that New Delhi is working with Russia to develop Sukhoi/HAL radar-evading fifth-generation fighter.