WASHINGTON (Reuters) — Israel and the United Arab Emirates reached a historic deal on Thursday that will lead to a full normalization of diplomatic relations between the two Middle Eastern nations in an agreement that U.S. President Donald Trump helped broker.

Under the agreement, Israel has agreed to suspend applying sovereignty to areas of the West Bank that it has been discussing annexing, senior White House officials told Reuters.

The deal was the product of lengthy discussions between Israel, the UAE and the United States that accelerated recently, White House officials said.

The agreement was sealed in a phone call on Thursday between Trump, Israeli Prime Minister Benjamin Netanyahu and Abu Dhabi’s Crown Prince Sheikh Mohammed Bin Zayed.

“HUGE breakthrough today! Historic Peace Agreement between our two GREAT friends, Israel and the United Arab Emirates,” Trump wrote on Twitter.

In the White House Oval Office, Trump said discussions between the two leaders had sometimes been tense. He said similar deals are being discussed with other countries in the region. A signing ceremony including delegations from Israel and the United Arab Emirates will be held at the White House in the coming weeks, Trump added.

“Everybody said this would be impossible,” Trump said. “After 49 years, Israel and the United Arab Emirates will fully normalize their diplomatic relations. They exchange embassies and ambassadors and begin cooperation across the border.”

The U.S. officials described the agreement, to be known as the Abraham Accords, as the first of its kind since Israel and Jordan signed a peace treaty in 1994. It also gives Trump a foreign policy success as he seeks re-election on Nov. 3.

Netanyahu, in his first comment on the deal, said on Twitter it is “a historic day for the state of Israel.”

Abu Dhabi’s crown prince said on Twitter that an agreement had been reached and that it would halt further Israeli annexation of Palestinian territories.

“During a call with President Trump and Prime Minister Netanyahu, an agreement was reached to stop further Israeli annexation of Palestinian territories. The UAE and Israel also agreed to cooperation and setting a roadmap towards establishing a bilateral relationship,” he said.

White House officials said Trump senior adviser Jared Kushner, U.S. Ambassador to Israel David Friedman and Middle East envoy Avi Berkowitz were deeply involved in negotiating the deal, as well as Secretary of State Mike Pompeo and White House national security adviser Robert O’Brien.

A joint statement issued by the three nations said the three leaders had “agreed to the full normalization of relations between Israel and the United Arab Emirates.”

“This historic diplomatic breakthrough will advance peace in the Middle East region and is a testament to the bold diplomacy and vision of the three leaders and the courage of the United Arab Emirates and Israel to chart a new path that will unlock the great potential in the region,” the statement said.

Delegations from Israel and the United Arab Emirates will meet in the coming weeks to sign bilateral agreements regarding investment, tourism, direct flights, security, telecommunications and other issues, the statement said.

The two countries are expected soon to exchange ambassadors and embassies.

The statement said that as “a result of this diplomatic breakthrough and at the request of President Trump with the support of the United Arab Emirates, Israel will suspend declaring sovereignty” over areas of the West Bank that were envisioned in the U.S. peace plan unveiled by Trump in January.

The agreement envisions giving Muslims greater access to the Al-Aqsa Mosque in the Old City of Jerusalem by allowing them to fly from Abu Dhabi to Tel Aviv, White House officials said.

The joint statement said the United Arab Emirates and Israel will immediately expand and accelerate cooperation regarding the treatment of and the development of a vaccine for the novel coronavirus amid the pandemic.