US Secretary of State John Kerry vowed on Sunday that any Israeli-Palestinian peace agreement would improve security in the region and would be "fair and balanced," as he was preparing to depart from his latest round of shuttle diplomacy on Sunday morning.

"I can guarantee all parties that President (Barack) Obama and I are committed to putting forward ideas that are fair and balanced, and to improving the security of all peoples," AFP quote him as telling journalist in Jerusalem.

Kerry was traveling to Jordan and Saudi Arabia to discuss his talks over the weekend with Israeli and Palestinian leaders.

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