The Israeli Broadcasting Corporation reported on Thursday that nine American transport planes loaded with bunker-busting bombs landed at the Nevatim Air Base near Tel Aviv in central Israel over the past 24 hours.

The official authority said that "nine American transport planes loaded with bunker-busting bombs and other defensive weapons landed at the Nevatim Air Base near Tel Aviv."

She added, "This came in anticipation of a potential US-Israeli strike, should the nuclear negotiations between Washington and Tehran fail."

There was no immediate comment from the US side regarding what was reported by the Israeli Broadcasting Authority until 18:50 GMT.

According to the agency, these bombs are used to enable Israel and the United States to target Iranian nuclear program facilities if negotiations with Tehran fail.

The authority described the landing of the nine planes in Israel as an unprecedented airlift between Washington and Tel Aviv.

She noted that Washington continues to transfer ammunition to Israel from US bases in the United States, Europe, and the Middle East, despite its veto of an Israeli attack on Iran last May.

On Sunday, the Israeli Broadcasting Corporation reported that dozens of American cargo planes had landed in Israel in recent days, carrying heavy MK84 bombs and interceptor missiles for the American THAAD air defense system deployed in Israel late last year.

Meanwhile, Washington has recently begun strengthening its forces and naval fleet in the Middle East amid escalating tensions with the Houthis. Last week, it dispatched a second aircraft carrier.

Media reports indicate that the White House has already begun reviewing potential targets for an attack on Iran, including nuclear facilities and ballistic missile and drone production centers.

This military alert comes as Washington and Tehran are holding talks regarding Iran's nuclear program. Both the United States and Israel are seeking to completely dismantle it following the strikes Iran has suffered in the region. Iran, however, rejects this and maintains that its program is for peaceful purposes.

On April 12, the Sultanate of Oman hosted the first round of Iranian-American talks, and it was agreed to hold a second round next Saturday in the Italian capital, Rome.

The first round was a "test of intent" and a "test of the waters" due to the state of mistrust between the two sides caused by President Donald Trump's unilateral withdrawal from the nuclear agreement signed between Iran and major powers, as well as Trump's recent threats, according to observers.

On the eve of the first round of negotiations, the White House warned of "expensive American options" if a new agreement on Iran's nuclear program failed, stressing that President Trump prefers to resolve the issue through direct talks with Tehran.

Trump's announcement of these negotiations came as a surprise to Tel Aviv, which had long urged the US administration to support military action against Iranian nuclear facilities, according to Hebrew media.