'This is a very big security related issue. Government is allowing American experts to examine our security establishments. Everything should be crystal clear,' he said.

The Left also made vocal its opposition to the deal.

Communist Party of India-Marxist (CPI-M) member Basudev Acharya said that the agreement should have been discussed in the house, while his party colleague Gurudas Dasgupta described it as a 'Himalayan blunder'.

Janata Dal-United (JD-U) leader Sharad Yadav claimed that Indian foreign policy was bowing down to a foreign power and asked the government to make a suo-moto statement. Similar sentiments were expressed by Biju Janata Dal (BJD) member Bhartruhari Mahtab, who said it was a matter of concern that the government had signed the deal when parliament was in session.

After hearing the members express their concern, Finance Minister Pranab Mukherjee, who is the leader of the house, got up to state that the government would make a statement on the deal later Tuesday.