By Humeyra Pamuk, Samia Nakhoul, Alexander Cornwell and Emily Rose

WASHINGTON/DUBAI/JERUSALEM (Reuters) -Israeli officials have told the Trump administration they do not want to wait two weeks for Iran to reach a deal to dismantle key parts of its nuclear program and Israel could act alone before the deadline is up, two sources said, amid a continuing debate on Trump's team about whether the U.S. should get involved.

The two sources familiar with the matter said Israel had communicated their concerns to Trump administration officials on Thursday in what they described as a tense phone call.

The Israeli officials said they do not want to wait the two weeks that U.S. President Donald Trump presented on Thursday as a deadline for deciding whether the U.S. will get in the Israel-Iran war, said the sources, who spoke on condition of anonymity.

The Israeli participants on the call included Israeli Prime Minister Benjamin Netanyahu, Defense Minister Israel Katz and military chief Eyal Zamir, according to a security source.

The Israelis believe they have a limited window of opportunity to move against the deeply buried site at Fordow, the crown jewel of Iran's nuclear program, said the sources. The U.S. is the only country with the bunker-busting bombs powerful enough to reach the facility, which is dug into the side of a mountain.

Reuters reported on Saturday that the United States is moving B-2 bombers to the Pacific island of Guam, reinforcing the possibility that the U.S. could participate directly in an attack. The B-2 can be equipped to carry America's 30,000-pound GBU-57 Massive Ordnance Penetrator, designed to destroy targets deep underground, such as the one at Fordow.

A person in Washington familiar with the matter said Israel has communicated to the U.S. administration that it believes Trump's window of up to two weeks is too long and that more urgent action is needed. The person did not say whether the Israelis made that point during the high-level call.

During the call, Vice President JD Vance pushed back, saying the U.S. should not be directly involved and suggesting that the Israelis were going to drag the country into war, said the sources. Defense Secretary Pete Hegseth also participated in the call, said a security source.

A White House official strongly disputed the characterization of Vance's comments in the call but declined to elaborate. "The Vice President did not say this during the call," said the official, speaking on the condition of anonymity.

The Jerusalem Post reported earlier that a phone call had taken place on Thursday.

The prospect of a U.S. strike against Iran has exposed divisions in the coalition of supporters that brought Trump to power, with some prominent members of his base urging him not to get the country involved in a new Middle East war.

Vance has frequently criticized past U.S. involvement in conflicts, including Iraq and Afghanistan, but has lately defended Trump against Republican critics who urge the administration to stay out of the Iran conflict.

Other Republicans, including Trump ally Senator Lindsey Graham of South Carolina, have said they hope Trump will help Israel finish destroying Iran's nuclear program.

Trump, who campaigned on a promise to keep the U.S. out of what he called "stupid" foreign wars, has himself seemed conflicted at times about whether to join the Israeli attack on Iran or focus on diplomatic efforts to end Tehran's nuclear program. But his rhetoric in recent days has become increasingly aggressive toward Iran. 

Iran insists that its nuclear program is for peaceful purposes only.

The Israeli Prime Minister's office did not immediately respond to a request for comment. Iran's mission to the United Nations also did not immediately respond.

STRIKE ON FORDOW INCREASINGLY LIKELY

Publicly, Netanyahu has not ruled out Israel attacking Fordow alone, though officials have not provided any details on how that would be achieved. 

Four sources said it is now increasingly likely that the country will launch a solo military operation. Israeli air superiority over much of Iran makes an operation more feasible, though still risky, said two of the sources.

The Israelis feel they have the momentum and have limited time given the costs of the war, one source added.

"I don't see them waiting much longer," said the source.

It is not clear whether such an operation would involve bombing, ground forces, or both. Two of the sources said that rather than attempting to destroy the entire site Israel could instead do significant damage to it.

That could mean focusing on destroying what is inside the site rather than the site itself, said one of the sources, declining to elaborate.

Some analysts have speculated that Israel could use special forces to enter Fordow and blow it up from inside.

Another scenario being considered, according to a source familiar with the matter, would be to drop a series of munitions in rapid succession in an attempt to breach the fortified site, similar to how the Israeli military killed Hezbollah leader Sayyed Hassan Nasrallah last year.

Such a strike could be followed by an incursion by special forces, the source said.

It is not clear that Israel has munitions powerful enough to penetrate the fortified facility. It is widely believed that to have a high chance of success, U.S. intervention would be needed.

But even with the massive firepower of a joint U.S.-Israeli military action, military and nuclear experts believe that a military operation would probably only temporarily set back a program the West fears is already aimed at producing atom bombs one day, although Iran denies it.

(Reporting by Humeyra Pamuk, Samia Nakhoul, Alexander Cornwell and Emily Rose; Additional reporting by Matt Spetalnick and Steve Holland in Washington and Maayan Lubell in Jerusalem; Writing by Don Durfee; Editing by Daniel Wallis)