Japanese P-3C patrol plane flies over the disputed islets known as the Senkaku islands in Japan and Diaoyu islands in China, in the East China Sea on 13 October 2011
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Biden: US deeply concerned by China's air zone

4 December 2013 Last updated at 06:43 GMT

The US remains "deeply concerned" about China's new air defence identification zone, Vice-President Joe Biden has told Japanese PM Shinzo Abe.

He called on China and Japan to improve communications to reduce the risk of accidents and miscalculations.

China's new air defence identification zone is likely to dominate talks during Mr Biden's six-day tour of East Asia.

Celia Hatton reports.