Describing the nuclear non-proliferation treaty as a "centrepiece" of his foreign policy, US President Barack Obama on Thursday said nations with nuclear weapons will work toward disarmament.
He also said he was committed to upholding the treaty to seek a world without nuclear weapons.
"...to seek a world without them. In the middle of the last century, nations agreed to be bound by a treaty whose bargain is clear: all will have access to peaceful nuclear power; those without nuclear weapons will forsake them; and those with nuclear weapons will work toward disarmament," he said as he received the Nobel Peace Prize for 2009.
"I am committed to upholding this treaty. It is a centerpiece of my foreign policy. And I am working with President Medvedev to reduce America and Russia's nuclear stockpiles," the US President said.
The world may no longer shudder at the prospect of war between two nuclear superpowers, but proliferation may increase the risk of catastrophe, he said.
The US President has vowed to achieve a nuclear-free world and has asked states, which have not signed the treaty, including India, to sign it.