The TV station, which sent personnel to the event, gave no immediate details and no footage was aired. It was unclear how it received the report.
The event was originally scheduled to be broadcast live by international media but TV stations reported technical problems at the scene.
‘s Foreign Minister Yu Myung-Hwan said he could not confirm the report since there were no communications with the site.
The North scheduled the event to symbolise its commitment to nuclear disarmament, one day after it handed over details of its atomic programmes as part of a six-nation pact.
The complex, 96 kilometres (60 miles) north of
Yongbyon produced the plutonium for an atomic weapons programme which culminated in a nuclear test in October 2006.
Yu told reporters that Friday morning received a copy of the declaration which handed over Thursday to , host of the six-party talks.
He said the parties — the two , the , , and — were holding consultations about a new six-party meeting, with a target date of early July.