Islamic nations are shunning a United Nations appeal for the worsening Pakistan floods, amid tensions with President Zardari.

Western countries have rallied to Pakistan's aid, with the US and Britain the leading donors in the drive to raise $US460 million in the first 90 days. Hillary Clinton, the US Secretary of State, is expected to attend a special meeting of the UN General Assembly on Thursday to show solidarity with Pakistan, diplomats said.

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