Hours after IAEA Director General Mohamed El-Baradei and Atomic Energy Commission Chairman Anil Kakodkar launched the talks, US Ambassador to the UN atomic watchdog Gregory Schultz said once El-Baradei agrees to endorse the safeguards pact, several countries will come forward to back the nuclear deal.

"Once the India-specific safeguards is approved by the IAEA board then it goes to the Nuclear Suppliers Group for getting exemptions for India for civilian nuclear programme," Schultz said on Wednesday.

He said the Indian negotiators, who will remain in Vienna after the return of Kakodkar to India, would carry out further consultations with the nuclear watchdog and then a special board meeting can be convened by the Chairman of IAEA board for the approval of the safeguards agreement by consensus.

The 45-country NSG wants the safeguards agreement to be approved by the board to carry out the further process, he said.

NSG had a consultative meeting in Vienna last week where increasing number of countries were preparing to give exemption for India. The EU and Russia are already supporting India in this regard and South Africa, which is currently heading the NSG, is also backing New Delhi.