ISLAMABAD, Pakistan (CNN) -- Nearly a half-billion dollars in "urgent contributions" are needed, the United Nations said Friday to aid displaced Pakistanis whose numbers are nearing 2 million.
More than $450 million is needed to meet the overall appeal for $543 million, the U.N. refugee agency said.
It added that almost $86 million has been provided or committed, so far.
Pakistan recently secured pledges from international donors for billions of dollars worth of aid to bolster the government of President Asif Ali Zardari.
Tuesday, U.S. Secretary of State Hillary Clinton announced that Washington would rush an additional $110 million in humanitarian assistance to help the Pakistanis who have been forced to flee their home as the Pakistani military confronts Taliban militants in northwestern Pakistan.
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