Hill extends N. Korea nuclear talks

SEOUL, South Korea (CNN) - U.S. nuclear envoy Christopher Hill spent a second day in North Korea for talks aimed at saving an unraveling disarmament deal with the reclusive communist nation, the U.S. Embassy said Thursday.

An embassy official gave no reason for the extension and did not know when Hill would leave the country.

Talks involving North Korea and five other nations - known as the six-party talks - had come to an agreement on North Korea disabling its Yongbyon nuclear reactor and reprocessing facilities that produced plutonium for nuclear weapons.

But in recent weeks, after the United States insisted on measures to verify information North Korea has provided, Pyongyang has taken steps that could reverse course and put the facilities back on line.