Jordan's King Abdullah II held talks on Monday with Israeli opposition leader Isaac Herzog on the Middle East peace process, a palace statement said.
"The king and the head of the Labour Party and member of the Knesset Isaac Herzog discussed efforts to achieve peace between Israel and the Palestinians under the sponsorship of the United States," the palace said without elaborating.
Herzog's visit to Jordan came as the United States is struggling to find a formula that would enable Israel and the Palestinians to continue faltering peace talks beyond an April 29 deadline.
US Secretary of State John Kerry last week visited Jordan, where he held sperate talks with the king and Palestinian president Mahmud Abbas.
Kerry was heading back to the region Monday, a US official said, adding that he would land in Tel Aviv and would possibly hold meetings in Jerusalem and Ramallah.
On Sunday Israel handed the Palestinians a proposal they hope will lead to an extension of their peace talks.
Jordan signed a peace treaty with Israel in 1994.