China plans to close airspace north of Taiwan for about half an hour next week, down from an originally announced three days, because of a falling object from a satellite launch vehicle, officials in Taiwan and South Korea said.

When asked about an earlier report on the airspace's closing, Yan Yu-hsien, deputy chief of the general staff for intelligence from Taiwan's defense ministry, said the "no-fly zone" would fall within the island's air defense identification zone (ADIZ), about 85 nautical miles north of its shores.

An ADIZ is a section of international airspace countries can arbitrarily define as theirs to monitor.