China 'monitored' US bombers in new air zone

China monitored the flight of two US bombers that flew across its newly-declared "air defence identification zone", its defence ministry has said.

The B-52 planes flew over disputed islands in the East China Sea on Tuesday without announcing themselves, defying new Chinese air defence rules.

Japan and the US are strongly opposed to the air zone declared by China.

They have accused China of unilaterally attempting to alter the status quo and escalate regional tensions.

Martin Patience reports.

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