New Delhi: In an apparent breakthrough in the stand-off between them on the Indo-US nuclear deal, government is believed to have assured the Left parties it will not not operationalise the agreement till a political mechanism completes its work.

The allies are expected to be formally communicated this government assurance when the leaders of the Congress and the Left parties meet at residence of Prime Minister Manmohan Singh this evening, Left sources said.

While senior Congress leaders met among themselves to finalise a statement on the political mechanism to be constituted, the Left leaders met separately to consider the government's draft proposal.

Asked whether a breakthrough has been achieved, External Affairs Minister Pranab Mukherjee merely said "wait". The statement to be made public after the Congress-Left meeting is expected to contain details of the political mechanism to be set up to go into concerns of the Left parties on the deal.
The statement is also expected to make public the assurance that till the mechanism completes its work the government may not not go ahead with operationalising the deal.