The JCS said Seoul countered by sending fighter jets including F-15Ks to the area, noting that the Chinese aircraft also flew into the Japanese Air Defense Identification Zone
To safeguard a country's air space, air defense identification zones
extend beyond territorial air space and are designed as a buffer to give a government more time to respond to potentially hostile aircraft.
The Air Defense Identification Zone
is airspace over land or water in which the ready identification, location, and control of civil aircraft over land or water is required in the interest of national security.
China's air force has faithfully carried out its mission and tasks, with China's navy, since it was tasked with patrolling the East China Sea air defense identification zone
and Japan have vowed not to recognize the air defense identification zone
, under which Beijing wants all civilian and military aircraft to identify themselves and obey its orders.
It is now considering implementing the inspections and refueling, in case Tokyo applies the emergency-at-periphery law, only on the sea under Japan's air defense identification zone
or ADIZ in a bid to avoid a military action, the sources said.
The bombers from Guam entered the Korean Air Defense Identification Zone
Tuesday night, according to a statement by South Korea Joint Chiefs of Staff (JCS), quoted by the news agency.
Japan said the missile reached its air defense identification zone
, the first time by a North Korean missile.
On a visit to Mongolia on Sunday, Secretary of State John Kerry also warned Beijing against setting up an air defense identification zone
over the disputed waters, saying it would be a provocative and destabilizing act.
President Benigno Aquino III told reporters Monday that there is no declared air defense identification zone
over the area and Philippine air patrols will still fly routes based on international law.
TEHRAN (FNA)- China does not feel threatened by countries in Southeast Asia and is optimistic about the situation in the disputed South China Sea, the Foreign Ministry said, warning Japan not to "spread rumors" it plans a new air defense identification zone
Last month China declared an Air Defense Identification Zone
(ADIZ) that covers much of the East China Sea, and expects all aircraft passing through to offer a flight plan and identification details.