Hill in North Korea for nuclear talks

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

Hill's visit comes at the invitation of North Korean officials and is part of a multi-capital trip that also includes South Korea, China and Japan.

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.