The ceasefire announced earlier this month was set to expire on April 22.
President Donald Trump announced "major combat operations" against Iran on Feb. 28, with massive joint U.S.-Israeli strikes targeting military, government and infrastructure sites.
Following the announcement of a two-week ceasefire, initial U.S.-Iran talks in Pakistan earlier this month failed to reach a peace deal. On Tuesday, Trump announced he is extending the ceasefire and continuing the blockade until Iran's proposal is submitted and discussions are concluded "one way or the other."
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."
The Iran-backed Lebanese militant group Hezbollah said it fired rockets and drones at Israeli forces on Tuesday for the first time since a 10-day truce took effect Friday "in response to the blatant and documented violations" by Israel.
The alleged violations included "attacks on civilians and the destruction of their homes and villages in southern Lebanon," Hezbollah said in a statement.
The Israel Defense Forces said it responded by striking Hezbollah's rocket launcher.
"The launches constitute a blatant violation of the ceasefire agreement," the IDF said.
President Donald Trump announced he is continuing the blockade and will "extend the Ceasefire until such time as their proposal is submitted, and discussions are concluded, one way or the other."
The U.S. will "hold our Attack on the Country of Iran until such time as their leaders and representatives can come up with a unified proposal," Trump said in a post on social media.
This comes hours after Trump told CNBC he did not want to extend the ceasefire and threatened continued bombing. He also said Iran had no choice but to accept a deal.
No final decision has been made on whether Iran will attend the Pakistan ceasefire talks, a spokesman for Iran's Foreign Ministry, Esmaeil Baqaei, said on Tuesday.
"It is not due to indecision," he added, but rather due to "contradictory messages, inconsistent behavior, and unacceptable actions by the American side," he said in a phone interview on Iranian state TV.
"From the very outset, we have faced violations of the ceasefire by the opposing side, including measures such as a naval blockade," Baqaei said, adding that Iran will pursue a diplomatic track "whenever it determines that such a path serves its national interests."
