An envoy of Prime Minister Manmohan Singh [Images] will travel to Switzerland [Images] to provide a brief on the Indo-US nuclear deal as the European country on Wednesday sought details of the agreement before it could finalise its position on the issue.

The issue came up during talks between Dr Singh and visiting Swiss President Micheline Calmy-Rey with the prime minister seeking support of the key Nuclear Suppliers Group member for the deal.

Calmy-Rey sought details of the agreement that can be implemented only after NSG approves it.

"I requested the prime minister to have an Indian expert to explain the Indo-US nuclear deal," Calmy-Rey told reporters in Delhi when asked about Switzerland's position on the Indo-US nuclear agreement.

The prime minister said "someone" will travel to Switzerland to brief her government on the deal, she said.

Besides being a member of the NSG, Switzerland is a member of the International Atomic Energy Agency Board of Governors.

After conclusion of the 123 agreement with the US, India is required to negotiate a safeguards agreement with the IAEA and approach the NSG to seek changes in the guidelines that regulate international nuclear trade.