There was a bit of good news for Navistar Wednesday, however: its joint venture with Chinese truck maker Anhui Jianghuai Automobile Co. has been approved by the Chinese government.

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Three more cases were recorded on Sunday - two in Shanghai and one in Anhui - raising the tally to 21, with six dead, The Beijing News reports.

BBC: China media: North Korea speculation

Over the last month, 43 people from Anhui, Jiangsu and Zhejiang provinces and Shanghai have been diagnosed with the new H7N9 strain of bird flu.

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WHO's China representative, Hans Troedsson, expressed concern about the unusual concentration of cases in Anhui, and about the occurrence of pulmonary and neurological symptoms not typically seen with hand, foot and mouth disease.

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