Trump calls Iran's latest response to proposal 'TOTALLY UNACCEPTABLE'

The U.S. has still not received a definitive response from Iran on the draft memo to end the war -- but there have been some negotiations playing out through different mediators, according to two officials familiar with the matter.

Qatar's Foreign Ministry confirmed that its prime minister and minister of foreign affairs met with Vice President JD Vance in Washington on Friday to discuss developments in the Middle East and "the Pakistani mediation efforts aimed at de-escalating tensions in a way that contributes to enhancing security and stability in the region."

While Pakistan is viewed as the lead mediator, Qatar has provided another backchannel for communication between Iran and the U.S. for much of the conflict, officials say.

And though President Donald Trump said there was no deadline for Iran's response, sources say the administration is increasingly eager to push Iran toward an agreement. One official said the forceful U.S. counterattacks against Iran (which Trump described as "love taps") in the Strait of Hormuz were motivated in part by a desire to speed up the negotiation timeline with Iran.

-ABC News' Shannon K. Kingston

The U.S. Central Command said it has redirected 57 commercial vessels and disabled 4 others to prevent the ships from entering or leaving Iranian ports.

-ABC News' Steven Beynon

Referring to negotiations with the U.S., Iranian Foreign Ministry spokesperson Esmaeil Baqaei said the country doesn't follow anyone's deadlines.

"The matter is still under discussion," Baqaei said. "We do our own job. We are not bound by their deadlines or timelines very much."

Secretary of State Marco Rubio told reporters the administration expected a response from the Iranian regime on Friday, but that "only stupid countries" wouldn’t respond to fire with fire when facing attacks like the U.S. did in the Strait of Hormuz.

"The red line is clear: They threaten Americans, they're gonna get blown up," Rubio told reporters Friday.

"If you fire at a U.S. Navy ship, what are we supposed to do?" Rubio said. "Of course we fired back on them. They were shooting at us. That's what I would expect to do. Only stupid countries don't shoot back when you're shot at," Rubio said. "And we're not a stupid country."

On talks with the regime, Rubio said “we should know something today” and “the hope is it's something that it can put us into a serious process of negotiation.”

“We're expecting a response from them today, at some point. We have not received that yet as—in the last in the last hour, but perhaps that will come. Their system is still highly fractured and a bit dysfunctional as well, so that may be serving as an impediment,” Rubio said. "I hope it's a serious offer. I really do."

-ABC News' Shannon K. Kingston