Shortly after the United Nations Security Council unanimously passed a resolution asking the non-Non Proliferation Treaty countries to sign the NPT, India on Thursday ruled out signing the agreement saying, "It cannot support a discriminatory" pact.

"As long as some countries possess nuclear weapons we are not prepared to be supportive of a discriminatory treaty that says some countries can have something and others cannot," Minister of State for External Affairs Shashi Tharoor told Times Now.

Earlier, India's Permanent Representative to the UN Hardeep Singh Puri, in a letter to United Nations Security Council President Susan E Rice of the US, rejected efforts to impose NPT on New Delhi and made it clear that it will not sign the pact as a non-weapon state as atomic arsenals are integral to its security.