Washington: White House national security adviser John Bolton said on Sunday he believed the bulk of North Korea's weapons programs could be dismantled within a year, although some experts say the complete process could take far longer.

Bolton told CBS's Face the Nation that Washington has devised a program to dismantle North Korea's weapons of mass destruction – chemical, biological and nuclear – and ballistic missile programs within a year, if there is full cooperation and disclosure from Pyongyang.

"If they have the strategic decision already made to do that and they're cooperative, we can move very quickly," he said. "Physically we would be able to dismantle the overwhelming bulk of their programs within a year."

He said Secretary of State Mike Pompeo will likely discuss that proposal with the North Koreans soon. The Financial Times reported that Pompeo was due to visit North Korea this week but the State Department has not confirmed any travel plans.