US President Barack Obama on Wednesday called for fresh efforts towards nuclear disarmament, and stressed North Korea and Iran would face renewed pressure if they did not follow international regulations, DPA reported
He pointed to Iran, which has not demonstrated that its nuclear programme is peaceful, and North Korea, which has not taken steps to abandon its weapons programme.
Earlier Wednesday, the chief nuclear negotiators from North Korea and South Korea failed at a meeting in Beijing to agree on restarting the six-party talks aimed at ending North Korea's atomic programmes that have been stalled since 2008.
"There is a future of greater opportunity for the people of these nations if their governments meet their international obligations," Obama said.
"But if they continue down a path that is outside international law, they must be met with greater pressure and isolation. That is what our commitment to peace and security demands."