The United Kingdom Maritime Trade Operations (UKMTO) Centre reported an Islamic Revolutionary Guard Corps attack on a container ship in the Strait of Hormuz in the early hours of Wednesday morning.

The unnamed vessel was approached by an IRGC gunboat and fired upon without any preceding challenge, UKMTO said. The IRGC fire "caused heavy damage to the bridge" but there were no casualties or environmental impacts reported, the alert said.

The incident occurred around 15 nautical miles northeast of the Omani coast in the eastern portion of the Strait of Hormuz, the UKMTO said.

President Donald Trump doubled down on his claim that Iran wants the Strait of Hormuz opened in a post to social media on Tuesday, shortly after he announced an open-ended extension of the ceasefire with Tehran.

"Iran is collapsing financially!" Trump wrote. "They want the Strait of Hormuz opened immediately -- Starving for cash!"

In an earlier social media post, Trump insisted that Iran is "losing" because of the U.S. blockade in the Strait of Hormuz. The president also claimed that Iran only wants to close the Strait in order to "save face."

Without specifying who, Trump also claimed that "people" told him "four days ago" that Iran wants to reopen the Strait, but he declined to lift the blockade because he says this is the U.S.' leverage point to secure a deal.

"But if we do that, there can never be a Deal with Iran, unless we blow up the rest of their Country, their leaders included!" Trump wrote.

The president also again extolled recent American military achievements in Iran. "Their entire Navy is at the bottom of the Sea, their Air Force is gone, their Anti Aircraft and Radar is wiped out, their Nuclear Labs and Storage Areas were OBLITERATED late one dark June evening by our Great B-2 Bombers, their leaders are DEAD," Trump wrote.

-ABC News' Meghan Mistry and Emily Chang

Pakistani Prime Minister Shehbaz Sharif thanked President Donald Trump for extending the ceasefire "to allow ongoing diplomatic efforts to take their course."

He called on both sides to continue to observe the ceasefire and said Pakistan will "continue its earnest efforts for negotiated settlement of conflict."

According to a White House official, Vice President JD Vance won't be traveling to Pakistan on Tuesday.

"In light of President Trump's TRUTH Social post confirming the United States is awaiting a unified proposal from the Iranians, the trip to Pakistan will not be happening today," the official said. "Any further updates on in-person meetings will be announced by the White House."

-ABC News' Emily Chang

Sen. Lindsey Graham, R-S.C., said he spoke with President Donald Trump and Secretary of Defense Pete Hegseth Wednesday morning about the “way forward” in Iran.

Graham said that he expects the blockade of Iranian ports to stay in place and even expand, saying "it could become global soon” unless Iran “shows a commitment to change their ways."

Graham was not clear about where this blockade would expand and what the U.S. is specifically asking the Iranians to commit to in terms of "changing their ways."

"I had a very good call this morning with @POTUS and @SecWar Pete Hegseth about the way forward regarding the Iran conflict," Graham said in a post on X Wednesday.

"I not only expect this blockade to stay in place until Iran shows a commitment to change their ways, I expect the blockade will be growing and that it could become global soon,” he said.

Graham also issued a warning to other countries amid threats of a global blockade, saying that any nation "assisting or thinking about assisting the Iranian regime in distributing its oil," will do so "at your own peril."