The Iranian response was sent via Pakistan on Sunday, state media said.
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 in April failed to reach a peace deal.
Trump later announced the open-ended extension of the ceasefire and the continuation of a U.S. blockade until negotiations are concluded "one way or the other."
The Israel Defense Forces said in a Thursday statement that it had killed more than 220 Hezbollah fighters and commanders over the past few weeks.
The IDF said 85 Hezbollah fighters were killed in the past week.
-ABC News' Jordana Miller and Othon Leyva
The Israel Defense Forces said in a Thursday statement that its Wednesday airstrike in southern Beirut -- the first on the capital since a ceasefire was agreed between Israel and Hezbollah last month -- killed Ahmed Ali Balout, the commander of Hezbollah's elite Radwan Force commando unit.
Balout, the IDF said, was "eliminated in a precise strike, in the Dahiyeh area of Beirut."
-ABC News' Jordana Miller and Othon Leyva
The U.S. and Iran are negotiating over a memorandum of understanding (MoU) aimed at breaking through the standoff in the Strait of Hormuz and setting a timeline for both sides to work out a more comprehensive nuclear deal.
The one-page MoU currently on the table from the Trump administration would see Iran easing its grip on the Strait of Hormuz and the U.S. gradually lifting its naval blockade of the country's ports over a 30-day period, according to officials familiar with the matter.
Officials underscore that nothing has been formally agreed to at this point and that some issues -- including ones related to Iran's ongoing demands to charge a toll for transiting the strategic waterway -- still need to be resolved.
Iranian and US negotiators have passed multiple draft versions of the MoU back and forth in recent days, and the administration is currently waiting for feedback from Iran on several points, they say.
In its current form, the one-page MoU does contain terms related to Iran's nuclear program, but the expectation is that most of the specifics would be negotiated over the 30-day period.
Officials have so far declined to describe the proposed MoU as a take-it-or-leave-it offer.
-ABC News' Rachel Scott and Shannon K. Kingston
President Donald Trump said that he would not set a deadline for Iran to make a deal, while speaking at the Oval Office on Wednesday.
Asked directly if there was a deadline for Iran, Trump said there was “never a deadline.”
“Never a deadline. It'll happen, it'll happen, but never a deadline,” Trump said.
Trump continued to express confidence that a deal with Iran was close. Asked what was different about this time compared to other times when a deal seemed close, Trump said that “a few days ago is a long time.”
"They want to make a deal badly. And we'll see if we get there. If we get there, they can't have nuclear weapons,” Trump said.
“Iran can not have a nuclear weapon, and they won't. And they've agreed to that, among other things,” Trump claimed.
-ABC News' Nicholas Kerr
