Washington (CNN) Jordan's King Abdullah drew a red line on the plan that the Trump administration is expected to unveil to attempt to resolve the Israeli-Palestinian conflict, telling White House senior adviser Jared Kushner Wednesday it must be based on a two-state solution that gives Palestinians a capital in East Jerusalem.

Kushner is traveling in Morocco, Jordan and Israel this week to meet with officials and drum up support for the long-awaited plan's economic portion, which will be unveiled during a June conference in Bahrain.

King Abdullah, who acts as custodian of Muslim holy sites in Jerusalem, has not committed to attend the conference.

In his discussions with the President's son-in-law, the King "stressed the need to step up all efforts to achieve comprehensive and lasting peace on the basis of the two-state solution, guaranteeing the establishment of an independent Palestinian state on the 4 June 1967 lines, with East Jerusalem as its capital, living side by side with Israel in peace and security, in accordance with international law and relevant UN resolutions," the Royal Hashemite Court said in a statement.

The statement served as a message to Kushner and his team, who have stressed that they do not feel bound by previous formulas that drove peace talks, including the idea of two states. Their approach is expected to focus on investment in Palestinian territories before dealing with political issues.

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