The world¡¯s top nitrogen fertilizer maker, Yara International, will buy at least 10 percent of the US$400 million Hong Kong IPO of China Blue Chemical, a fertilizer unit of the parent of CNOOC Ltd., a Hong Kong newspaper reported Thursday.

The South China Morning Post cited market sources as saying Yara would like to buy as much as 40 percent of the offering but a final decision on the size had yet to be made.

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