The Trump administration is reportedly considering nuking Iran.

The Guardian on Wednesday claimed that the U.S. military has reservations regarding the success of using a bunker-buster bomb, a nonnuclear weapon, to eliminate Iran’s Fordo nuclear facility, buried deep in a mountain. Two defense officials were reportedly briefed that only a tactical nuclear weapon could reach the facility, but The Guardian noted that Trump is not considering using a tactical nuke.

On Thursday, Fox News senior White House correspondent Jaqui Heinrich reported that the White House told her otherwise.

“I was just told by a top official here that none of that report is true, that none of the options are off the table, and the U.S. military is very confident that bunker busters could get the job done at Fordo,” Heinrich said.

After days of bombings and further escalation from Israel and the U.S., Trump is now openly floating nuking a country of 90 million to stop it from building the nukes the West has claimed it’s been building for decades. This disgusting provocation would leave countless innocents dead, poison the region for decades, and almost certainly lead to even deeper international conflict. All this from a president who ran on a promise to end endless wars and bring peace to the Middle East.

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When could US attack Iran? What we know about timing, targets

• President Donald Trump is expected to decide within two weeks on U.S. military action against Iran’s nuclear program.

• Israel has launched massive strikes with over 600 killed, including civilians.

• Bunker-buster bombs are believed necessary to significantly damage the Fordo nuclear fuel enrichment plant, built deep within a mountain.

WASHINGTON - President Donald Trump has been weighing whether to attack Iran by striking its well-defended Fordo uranium enrichment facility, as conflict intensifies in the Middle East.

The open conflict between Israel and Iran erupted last Friday with a surprise wave of Israeli airstrikes targeting nuclear and military sites, top generals and nuclear scientists. At least 639 people, including 263 civilians, have been killed in Iran and more than 1,300 wounded, according to a Washington-based Iranian human rights group.

When could the US attack?

In Washington, the White House announced Thursday that U.S. President Donald Trump will decide within two weeks whether to join Israel’s campaign against Iran’s military and nuclear program, signaling that Trump still sees a window for diplomacy to address Israeli and U.S. concerns about Iran's nuclear program.

"Based on the fact that there’s a substantial chance of negotiations that may or may not take place with Iran in the near future, I will make my decision whether or not to go within the next two weeks," Karoline Leavitt, the press secretary, told reporters, reading out Trump's statement.

On Wednesday, Trump urged Iran to surrender unconditionally and said the U.S. knows where Iran’s Supreme Leader Ayatollah Ali Khamenei is hiding — but doesn’t want him killed "for now."

Iran's supreme leader on Wednesday rejected U.S. calls for surrender in the face of more Israeli strikes and warned that any military involvement by the Americans would cause "irreparable damage to them." European diplomats prepared to hold talks with Iran on Friday.

Trump on Monday abruptly departed this week's G7 Summit in Canada due to the intensifying conflict, returning to Washington for urgent talks with his national security team. He also posted an ominous social media warning that "Everyone should immediately evacuate Tehran!"

The State Department and U.S. military last week directed a voluntary evacuation of nonessential personnel and their loved ones from some U.S. diplomatic outposts in the Middle East.

What are bunker-buster bombs?

Bunker-buster bombs are believed necessary to significantly damage the Fordo nuclear fuel enrichment plant, built deep within a mountain.

Earth penetrator weapons, known as "bunker busters," are bombs that are designed to burrow deep into the ground some tens of feet before detonating, greatly increasing their ability to destroy buried targets.

More specifically, the 30,000 pound GBU-57/B bunker buster, also known as the Massive Ordinance Penetrator (MOP) was used during the attack and is a precision-guided bomb designed to attack deeply buried and hardened bunkers and tunnels, according to the U.S. Air Force.

The bomb is believed to be able to penetrate about 200 feet below the surface before exploding, and the bombs can be dropped one after another, effectively drilling deeper and deeper with each successive blast.

What is Iran’s Fordow nuclear site?

Activity at Fordo, just north of the Shiite holy city of Qom, has remained a major concern for nuclear nonproliferation experts. Buried under a mountain and protected by anti-aircraft batteries, Fordo appears designed to withstand airstrikes. Its construction began at least in 2007, according to the International Atomic Energy Agency, although Iran only informed the U.N. nuclear watchdog about the facility in 2009.

"As a result of the augmentation of the threats of military attacks against Iran, the Islamic Republic of Iran decided to establish contingency centers for various organizations and activities," Iran wrote in a letter to the IAEA.

Satellite images, however, suggest construction at the Fordo site as early as between 2002 and 2004, the IAEA said. In August 2002, Western intelligence services and an Iranian opposition group had revealed another covert nuclear site at the central city of Natanz. Iran also "carried out activities relevant to the development of a nuclear explosive device" in a "structured program" through the end of 2003, the IAEA has said.

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Bombing Iran's underground nuclear plant might not be effective, one expert says

A U.S. attack on a key Iranian nuclear facility might not be effective, even if American military's massive bunker-buster bombs are used, a national security expert familiar with Iran's program told ABC News on Thursday.

While the 30,000-pound bombs have been tested, they've never actually been used and the exact nature of the concrete and metal protecting the site located deep inside a mountain -- that the bombs would need to penetrate -- isn't fully known.

Joe Cirincione, who has spent decades researching nuclear proliferation for Congress and other world leaders, told ABC News that while attacking Iran's nuclear enrichment program would cripple its nuclear weapons capability, it would not eliminate it.

At the center of President Donald Trump's decision on whether to attack Iran is the Fordo nuclear enrichment facility in northwest Iran. It's said to be built 300 feet deep inside a mountain -- maybe more -- and reinforced with concrete, according to experts.

The U.S. weapon touted as able to strike inside the Fordo facility the GBU-57 A/B Massive Ordnance Penetrator bomb, known as a "bunker buster." It's capable of penetrating 200 feet deep inside an underground target and then exploding, experts say.

Cirincione said that using the untested weapon would not guarantee success.

"Fordo is not an easy target. They made this very difficult for the United States to destroy," he said. "Even [the bunker buster] can not penetrate 300 feet of mountain and reinforced concrete.

"You need to drop a bomb, that will dig a crater, and then another bomb in that crater and then another bomb, and then another," he said. "And then you will only damage that part of the facility."

Cirincione also noted that even if there's some damage done, Iran's government has the knowledge, experience and, most important, enough enriched uranium and centrifuges in other locations to move forward with relative ease.

The International Atomic Energy Agency this week passed a resolution that stated Iran had breached its non-proliferation agreements and has been illegally stockpiling enriched uranium.

"I've been there, it's half a mile underground," Rafael Grossi, the IAEA's director general, said about the Fordo plant, as reported by The New York Times.

Days after the IAEA acted, Israeli forces attacked Iranian targets after Israeli Prime Minister Benjamin Netanyahu claimed the Iranian government could create a nuclear weapon "in a very short time.

Iranian officials have dismissed claims by Israel that they are building a nuclear weapon.

White House spokeswoman Karoline Leavitt told reporters Thursday that the president would make a decision about attacking Iran "in two weeks."

Cirincione stressed that continued military strikes would not be a good option for Israel or the U.S. if the goal is an Iran without nuclear weapons.

"Once you recognize there is no military solution to this problem, the military solutions can only be threats to Iran and the only answer is to get Iran to agree to roll back and end its capabilities," he said.