Israeli Defense Forces launched a sweeping strike on Iran following months of attempted, and seemingly failed, nuclear negotiations between the Trump administration and Tehran.

Fox News' Trey Yingst reported that Israel carried out strikes in Iran, adding that explosions were heard in the capital of Tehran.

A state of emergency has been declared across Israel as the country braces for an Iranian response.

The strikes came after Israel first threatened to go after Iran’s nuclear facilities in early November following a series of back-and-forth missile attacks between April and October last year.

Direct engagement between Israel and Iran began after Tehran in April 2024 levied its first ever direct strikes against Israeli territory. Israel responded less than a week later and destroyed part of Iran’s S-300 long-range air defense system.

TRUMP WARNS ISRAEL STRIKE ON IRAN 'COULD HAPPEN' AMID MIDDLE EAST EVACUATION, NUCLEAR NEGOTIATIONS

On Oct. 1, Iran levied a ballistic missile strike on Israel, to which Jerusalem responded with a series of hits on Oct. 26 that targeted military facilities and missile storage locations.

Israeli Prime Minister Benjamin Netanyahu later confirmed that Israel’s October strike partially degraded part of Iran’s nuclear program, and international concerns remained heightened that the security threat could escalate in the region. 

Some hoped that President Donald Trump’s administration would be able to make headway in nuclear negotiations where the Biden administration, and others in the international community could not. 

Negotiations between Washington and Tehran, mediated by Oman, resumed in Muscat on April 12 and Trump repeatedly called on Netanyahu not to hit Tehran and to let negotiations proceed. 

IRAN BECOMING 'MUCH MORE AGGRESSIVE' IN NUCLEAR TALKS, TRUMP TELLS FOX NEWS

Following the first round of talks, Middle East Special Envoy Steve Witkoff told Fox News that the U.S. was looking to limit Iran’s uranium enrichment to 3.67%, a level generally used for civil nuclear energy needs. 

Under the Joint Comprehensive Plan of Action (JCPOA), which Trump pulled out of in 2018, Iran committed to maintaining no more than this level of enrichment until 2031 – though it has been found to have repeatedly violated this agreement. 

But the next day, on April 15, Witkoff backtracked his comments and said in a statement that "Iran must stop and eliminate its nuclear enrichment and weaponization program."

Four days later the U.S. entered its second round of nuclear talks in Rome on April 19, before a third round was held in Muscat on April 26. Both sides expressed optimism following the talks.

Details of the negotiations were not released, but reports suggested the discussions largely focused on limiting Iran's nuclear program in exchange for sanction relief.

Talks appeared to take a turn after the U.S. hit Iran with another round of sanctions in late April, which resulted in the postponement of the previously scheduled May 3 talks.

The fourth round of talks began to show signs of strain when Iran described the negotiations as "difficult but useful," and Iran's Foreign Minister Abbas Araghchi made clear that Washington’s zero enrichment demand was a "non-negotiable."

Oman’s Foreign Minister Badr al-Busaidi reported that "some but not conclusive progress" was made following the fifth round of talks held in Rome on May 23. 

By early June, Trump and Iranian leader Ayatollah Ali Khamanei had repeatedly made clear they both would refuse to bend when it comes to the issue of enrichment, but a sixth round of talks was still set for June 15 in Oman.

It is unclear if those talks will continue following the Israeli strike.

Los Angeles residents may begin seeing Marines in the area as soon as Thursday, with protection operations in coordination with the National Guard set to begin Friday.

The 700 Marines were reportedly sent by President Donald Trump to Seal Beach, which is south of L.A. County, to train for nonlethal weapons training—including hand-to-hand combat and crowd control.

Seal Beach training recently finished, and the Marines have moved to "familiarization" training alongside the National Guard in Los Angeles, a U.S. defense official told Fox News. 

NATIONAL GUARD TROOPS DETAIN ANTI-ICE PROTESTERS IN LOS ANGELES UNDER TRUMP'S ORDERS

"They are finishing up training and transitioning to a mission-familiarization phase alongside the 79th IBCT," the official said Thursday. "So it's possible you'll start seeing Marines in the L.A. area today. They have NOT officially begun operations yet." 

More than 2,000 National Guardsmen are still stationed in L.A., as protests are expected to continue through the weekend.

MARINES STILL NOT ON LA STREETS, SEEN IN HAND-TO-HAND COMBAT TRAINING

"No Kings" protests against President Donald Trump and the administration are slated to take place in thousands of cities across the U.S. on Saturday, as the nation's capitol hosts a military parade for the Army’s 250th anniversary and Flag Day.

The protests also coincide with the president's 79th birthday.

Though the Marines, acting under NORTHCOM’s direction, are only tasked with protecting federal property and law enforcement, the cost of the military endeavor has drawn criticism.

Officials estimated sending the Marines and National Guard to California will cost taxpayers about $134 million, taking away from the operations and maintenance budget.

Defense Secretary Pete Hegseth said during a Senate Appropriations Committee hearing that the troops were necessary to keep the city and its residents safe.

HEGSETH SPARS WITH SENATE DEMOCRATS OVER MARINE DEPLOYMENT TO LA ANTI-ICE RIOTS: 'NOT ABOUT LETHALITY'

"[It's] not about lethality. It’s about maintaining law and order on behalf of law enforcement agents who deserve to do their job without being attacked by mobs of people," Hegseth said. "We are very proud that the National Guard and the Marines are on the streets defending the ICE agents, and they will continue." 

Despite legal challenges by California Gov. Gavin Newsom, Hegseth said there is "plenty of precedent" for the U.S. supporting law enforcement officers.

Fox News Digital's Michael Dorgan and Danielle Wallace contributed to this report.