US Secretary of State John Kerry Wednesday pursued his hopes of ending the war in Syria and bringing “Israel" and the Palestinians back to negotiations on the third-day of a whirlwind tour.

US Secretary of State John Kerry Wednesday pursued his hopes of ending the war in Syria and bringing “Israel" and the Palestinians back to negotiations on the third-day of a whirlwind tour.

Fresh from a marathon day of diplomacy in Moscow at which he agreed with Russian leaders to organize a conference seeking to end the bloodshed in Syria, the new top US diplomat met for talks with “Israeli” peace negotiators.

In a surprise move, Kerry announced he would make his fourth trip back to the Zionist entity in less than three months towards the end of May, in attempt to renew stalled talks.

All sides were approaching the issues "with a seriousness of purpose that has not been present in a while and we all believe that we are working with a short time span," Kerry said as he met Livni in the US ambassador's residence in Rome.

He added they were working through "a threshold of questions" and he would return to "Israel" around "the 21 or 22 of this month" to meet Zionist Prime Minister Benjamin Netanyahu and Palestinian Authority President Mahmoud Abbas.

Kerry will also meet with Jordanian Foreign Minister Nasser Judeh in Rome on Thursday for talks on both Syria, and Jordan's role in the peace process.

During meetings in Moscow lasting into the early hours of Wednesday, Kerry agreed with Russian leaders to convene a new international conference to try to find a way to end the Syrian conflict.

Russian Foreign Minister Sergei Lavrov and Kerry said they hoped the conference could be held by the end of May to build on the Geneva accord agreed by world powers last June for a peaceful solution in Syria.