The US ambassador's car surrounded by protesters
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China-Japan row: objects thrown at US ambassador's car

20 September 2012 Last updated at 09:40 BST

The US ambassador's car was surrounded at the gates of the American embassy in Beijing.

The demonstrators chanted anti-American slogans, and threw small objects at the vehicle.

Tensions were high on Tuesday after days of sometimes violent anti-Japanese protests in China, over a chain of disputed islands in the east China Sea.

Martin Patience reports.