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Dead pigs dumped in Chinese river 'a daily occurrence'

11 March 2013 Last updated at 09:36 GMT

An inquiry has been launched in China after more than 900 dead pigs were found floating in a river near the eastern city of Shanghai.

No evidence has been found that the animals in the Huangpu river were dumped there or died of any animal epidemic, officials say.

But measures are being taken to monitor the quality of the water.

Martin Patience reports.