China has attempted to stamp its sovereignty on airspace over islands Japan also claims, a move that threatens to escalate a longstanding territorial dispute between the Asian powers.
The Chinese defence ministry announced on Saturday that it would establish an “air defence identification zone” over the uninhabited islets in the East China Sea known in Japan as the Senkaku islands and in China as the Diaoyu islands.
It added that China would take “defensive emergency measures” against aircraft that entered the zone without identifying themselves.
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