Kushner and Greenblatt will be accompanied Director of Policy Planning and Senior Policy Advisor to Secretary of State Mike Pompeo Brian Hook, and Kushner's 28-year-old protégé Avi Berkowitz.
Palestinian officials have been invited to a USA conference on the Middle East hosted by Poland next week where White House senior adviser Jared Kushner will discuss plans for peace between the Palestinians and Israelis, a senior US official said on Friday.
White House officials say the administration is preparing to release its final peace plan between Israel and the Palestinians after Israel's elections, which are scheduled for April 9.
Prior to Warsaw, Kushner will travel with U.S. peace envoy Jason Greenblatt to Oman, Bahrain, Saudi Arabia, the United Arab Emirates, and Qatar, to discuss the economic part of the plan, according to Israeli media.
" The economic plan only works if the region supports it", one official who briefed a small group of reporters said, according to Reuters. The Warsaw event will be one of the first occasions where he will discuss the plan publicly, although he is not expected to reveal any details.
In a statement Thursday the Palestinian foreign ministry labelled the meeting "an American conspiracy meant to get the participants to adopt the U.S. views on issues of the region, particularly the Palestine question".
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It said the Palestinian government would ignore all conclusions made by the conference.
The Palestinian Authority has castigated the move, declared the United States no longer an honest broker in negotiations, and rejected any plan the White House may come out with, with PA President Mahmoud Abbas calling it the "slap of the century".
They see the eastern part of the disputed city as the capital of their future state and have said Washington's pro-Israel bias meant the USA could no longer be the main mediator in stalled Palestinian-Israeli peace talks.
Trump has said the Gulf Arab nations should play a bigger role in assisting Palestinians even as the United States has cut back much of its assistance.
PA Chairman Mahmoud Abbas has declared his refusal to discuss any proposed American peace plan because President Trump had recognized Jerusalem as Israel's capital, but perhaps being given eastern Jerusalem would induce him to rejoin the peace process.