Washington, Mar 4: As prominent US lawmakers asked India to stick to a July timeline on the nuclear deal, the Bush administration has said it wants to see that the agreement "moves forward" as soon as possible and India gets an opportunity to work out "internal political issues".

"... We want to see this agreement concluded. We think it's in the best interests of India, the United States, as well as in global nonproliferation efforts. But, as you know, we've acknowledged that there are internal political issues for the Indian government to work out, and it's important that they have an opportunity to do so," State Department's Deputy Spokesman Tom Casey told reporters.

He was asked whether the "now or never" warning by US lawmakers was due to an "urgency" in the two countries to finalise the nuclear agreement. "US lawmakers, members of Congress, speak for themselves. They have a very important role to play in this process. But when they are abroad, they are speaking in their own name as members of our legislative branch," Casey said. The senior State Department official added that the US wanted to see the agreement "concluded as quickly as possible".

"But ultimately, the Indian government needs to be fully comfortable with it and they need to be able to do move things forward," Casey said.

The comments came ahead of US Assistant Secretary of State Richard Boucher's two-day visit to India from today during which the two sides are expected to review progress on implementation of the civil nuclear deal.

The Indian side is expected to provide an update on its talks with IAEA on the safeguards agreement, a a key step towards operationalisation of the deal.

"There are members of Congress who have pointed out their concerns about -- as we enter our own election cycle here -- of the difficulties of getting such an agreement through Congress..... But we do believe this is an important agreement -- a historic agreement, and we would like to see it move forward," Casey said.

"It would be a shame if this opportunity, though, for both sides was lost. And we certainly, therefore, hope that we can reach an agreement as soon as possible," he added.

Casey said Nicolas Burns, who stepped down as Under Secretary of State on Friday, has agreed to continue on in a consultative capacity "working on, specifically, this issue".

"And so,I think Nick will still be very much engaged, involved in this process and will do what he can to help see that this agreement in all its aspects does get concluded," Casey said.