Iran has pledged to provide financial assistance to the new Palestinian government, which is expected to be in place next month.
The United States has sought to build an international front against Hamas since it won the Palestinian parliamentary elections.
Most governments in the West have agreed to insist that Hamas renounces violence.
Yesterday, Egypt rejected an appeal by the US Secretary of State, Condoleezza Rice, for Arab states to deny direct aid to Hamas when it forms a government.
