President Trump says US Navy will begin blockade of Strait of Hormuz

Vice President J.D. Vance said that the United States has “never once” said that Lebanon was part of the U.S.-Iran ceasefire deal as Israel launched on Wednesday a barrage of attacks on the country.

“Look, if Iran wants to let this negotiation fall apart in a conflict where they were getting hammered over Lebanon, which has nothing to do with them, and which the United States never once said was part of the ceasefire ... that's ultimately their choice. We think that would be dumb, but that's their choice,” Vance said, speaking to reporters in Hungary.

“Neither us nor the Israelis said that that was going to be part of the ceasefire,” Vance said later.

Vance said that any confusion about whether Lebanon was included in the ceasefire proposal comes from “a legitimate misunderstanding” from all sides.

“I think the Iranians thought that the ceasefire included Lebanon, and it just didn't. We never made that promise,” Vance said. “We never indicated that was going to be the case. What we said is that the ceasefire would be focused on Iran, and the ceasefire would be focused on America's allies, both Israel and the Gulf Arab states.”

Vance also repeated his claim that ceasefires are “messy,” but that the White House has been clear to allies that bombing should stop.

“What we have been very clear about is that we want to stop the bombing. We want our allies to stop the bombing, and with the Iranians to do the same thing. We're seeing evidence that things are going in the right direction, but it's going to take a little time,” Vance said.

White House press secretary Karoline Leavitt also said on Wednesday that Lebanon was not part of any ceasefire agreement.

-ABC News’ Isabella Murray and Hannah Demissie

Lebanese Prime Minister Dr. Nawaf Salam declared Thursday a national day of mourning, as health officials in the country say Israeli strikes have killed at least 1,739 people and wounded 5,873 others since March 2.

Salam also announced the closure of government offices, public institutions, and municipalities on Thursday, with flags to be flown at half-staff, and the adjustment of regular programming on radio and television stations to reflect the mourning.

Iran's parliamentary speaker Mohammad Bagher Ghalibaf laid out what he claims are U.S. "violations" of the ceasefire since the agreement went into effect Tuesday night.

The speaker said Lebanon is included in the ceasefire agreement reached, but Israel has continued strikes on Lebanon on Wednesday.

The speaker claimed the framework allowed Iran the right to enrich uranium which Trump has denied.

He also claimed "an intruding drone" entered into Iranian airspace, which was destroyed in the city of Lar in Fars Province.

The Islamic Revolutionary Guard Corps said it intercepted and destroyed a Hermes 900 drone over the central province of Fars earlier Wednesday, according to the semi‑official Fars News Agency.

This was reported after Iran’s oil ministry’s news outlet said the country’s Lavan oil refinery was hit by a strike. Israel denied involvement in the Lavan explosion.

At least 254 people have been killed and another 1,165 have been injured in Israeli attacks across Lebanon on Wednesday, Lebanese Civil Defense spokesperson Elie Khairallah confirmed to ABC News.

Of those killed, 92 people were in Beirut, Lebanese Civil Defense said. Another 61 were killed were in Beirut's southern suburbs, according to a breakdown of the casualties in a press release from the Lebanese Civil Defense.

-ABC News' Ghazi Balkiz