The United States is promising $US212 million ($A229.38 million) in aid to the Palestinians as part of an international effort to rebuild the Gaza Strip after this summer's 50-day war.
US Secretary of State John Kerry says people in Gaza "need our help desperately - not tomorrow, not next week, but they need it now."
He announced the new money at a donor conference for the Palestinians in Cairo.
The Palestinians are seeking $US4 billion in international aid.
At least 100,000 Gazans lost their homes in the war and much of the territory's infrastructure was damaged.
Earlier on Sunday, the Palestinian and Egyptian presidents called on Israel to commit to a long-term peace initiative.
They urged Israel to give up land seized in the 1967 war and accept a fair solution for Palestinian refugees in exchange for full recognition.
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