China air force carries out drills in Sea of Japan and around Taiwan

BEIJING (REUTERS) - China's air force carried out another round of long-range drills on Monday (Dec 18), flying into the Sea of Japan and prompting South Korean and Japanese jets to scramble.

China has in recent months ramped up its long-range air force drills, particularly around Taiwan, claimed by China as its own.

The air force said in a statement that fighter and bomber aircraft flew through the Tsushima Strait that separates South Korea from Japan and into international waters in the Sea of Japan.

The Sea of Japan is not Japan's, and the drills were lawful and reasonable, air force spokesman Shen Jinke said in the statement, describing the exercises as routine and pre-planned.

The Japanese Defence Ministry said in a statement that the aircraft - two SU-30 fighters, two H-6 bombers and one TU-154 reconnaissance plane - had not violated Japan's airspace.

In Seoul, South Korea's Joint Chiefs of Staff said five Chinese military planes were spotted entering the Korean Air Defence Identification Zone, and fighter jets scrambled in response.

The Chinese aircraft also flew through Japan's air defence identification zone, it added.

"Our fighter planes took normal tactical measures, identifying the models of the Chinese planes and flying aerial surveillance until they left," the South Korean statement said.

Chinese air force spokesman Shen alluded to the scrambled aircraft, saying they "responded to interference from foreign military aircraft" but were able to achieve the aim of their drill.

Taiwan's military said that China had staged a separate drill at the same time, flying through the Bashi Channel between Taiwan and the Philippines and then returning to base through the Strait of Miyako, to Taiwan's north and near Japan's southern islands.

Taiwan monitored Japan sending F-15 fighters to intercept, Taiwan's defence ministry added in its statement.

China's air force last week conducted "island encirclement patrols" near Taiwan, after a senior Chinese diplomat threatened that China would invade the self-ruled island if any US warships made port visits there.

China suspects Taiwan President Tsai Ing-wen, who leads the independence-leaning Democratic Progressive Party, wants to declare the island's formal independence. Tsai says she wants to maintain peace with China but will defend Taiwan's security.

China's air force exercises also come amid regional tensions over North Korea's nuclear and missile programmes, with bellicose rhetoric from both North Korea and US President Donald Trump.

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