JERUSALEM — White House adviser Jared Kushner on Sunday trumpeted the recent agreement by Israel and the United Arab Emirates to establish diplomatic relations as a historic breakthrough and said “the stage is set” for other Arab states to follow suit, but he gave no indication that any new deals were imminent.

Appearing alongside Israeli Prime Minister Benjamin Netanyahu and the U.S. national security adviser Robert O’Brien, Kushner spoke a day before he is to join a senior Israeli delegation on the first commercial flight from Israel to the UAE. The flight holds great symbolic value and is a key step in what is expected to be full normalization between Israel and the UAE.

The Aug. 13 announcement makes the UAE just the third Arab country to establish full diplomatic relations with Israel, and the first to do so in over 25 years. The other countries are Egypt and Jordan. It reflects a shifting Middle East in which shared concerns over Iran have overtaken traditional wall-to-wall Arab support for the Palestinians.

“We must seize that optimism and we must continue to push to make this region achieve the potential that it truly has,” said Kushner, President Donald Trump’s son-in-law and chief Mideast adviser.

But predictions by Israeli and American officials, including Kushner, that other Arab countries would follow the UAE have not yet materialized.

U.S. Secretary of State Mike Pompeo toured the region last week, stopping in Sudan, Bahrain and Oman — three countries widely seen as candidates to establish ties with Israel — but appeared to leave empty-handed.

The flurry of U.S. diplomatic activity comes as the Trump administration presses ahead with ambitious plans to promote Arab-Israeli rapprochement even in the absence of a settlement to the Israeli-Palestinian conflict, which had long been seen as a prerequisite for Israel to reach peace deals with all of its Arab neighbors.

Gulf Arab countries, which like Israel share deep animosity toward Iran, have shown an increasing willingness to make back-channel ties with Israel public.

Israel Prime Minister Benjamin Netanyahu said the agreement with the UAE would bring “unbridled” trade and opportunities.

“You will see how the sparks fly,” he said.

Netanyahu also said the deal with the UAE proves the Palestinians no longer have a “veto” over regional peace. The Palestinians have accused the UAE of treason.

“If we have to wait for the Palestinians, we will have to wait forever,” Netanyahu said.