Washington: Due to some top American Senators have put a hold on the use of US tax payers' money to subsidize Pakistan's purchase, he Obama administration has asked Pakistan to "put forward" its "national funds" to buy F-16 fighter jets.

On Monday, US state department spokesman John Kirby told reporters at his daily news conference- "While Congress has approved the sale, key members have made clear that they object to using FMF (foreign military financing) to support it. Given Congressional objections, we have told the Pakistanis that they should put forward national funds for that purpose".

On February 11, The move taken by the state department about its determination to sell eight fighter jets to Pakistan at an estimated cost of USD 700 million, was opposed by the Indian Government it summoned the US ambassador to India, Richard Verma, to lodge its protest.

In the US, top American lawmakers led by Senator Bob Corker, chairman of the powerful Senate Foreign Relations Committee, argued that Islamabad was not taking enough action against terrorist organisations, in particular against the Haqqani network, and that there continue to be terrorist safe havens in Pakistan.

It was announced by the US publicly, on the occasion of the fifth anniversary of the killing of Osama bin Laden who was found in a safe hideout in Abbottabad on the outskirts of a Pakistan Army garrison town, that it has asked Pakistan to use its national resources to buy F-16.

"As a matter of long-standing principle, the Department of State opposes conditions on the release of appropriated foreign assistance funds. We believe that such conditions limit the president and the secretary's ability to conduct foreign policy in the best interest of the United States," Kirby said.