Washington: US Senate Majority Leader Bill Frist has assured Prime Minister Manmohan Singh that law makers are 'working on' India's concern over certain aspects of the bills passed by the Congress to implement the civil nuclear deal, and that the final legislation was on track for completion this week.

Frist, in a telephone call initiated by him last morning expressed confidence to Manmohan Singh that Congressional action on the legislation will be completed this week.

"I spoke today by telephone with Indian Prime Minister Manmohan Singh regarding the pending legislation to authorise civil nuclear cooperation between the United States and India. I assured Prime Minister Singh that one of my top priorities for the remainder of this Congress is to enact this legislation, and I told him I am confident that we will be able to complete congressional action on it this week," Frist said in a statement to the media.

Prime Minister Singh stressed that there are a number of provisions in the bills passed by the House and Senate that are problematic for the Indian government because they depart from the understanding reached with President Bush on this issue on July 18, 2005.

Frist said he assured Manmohan Singh that his concerns would be dealt with, saying that he has named himself to be one of the negotiators on the bill in order to be able to participate personally in the process of refining the legislation.