President Donald Trump announced on Sunday that he's ordered U.S. personnel to safely guide ships and crews from countries that are not involved with the Iran war out of Strait of Hormuz, which is currently subject to a naval blockade.

This "humanitarian gesture," which Trump called "Project Freedom," will begin Monday morning "Middle East time," he wrote.

"The Ship movement is merely meant to free up people, companies, and Countries that have done absolutely nothing wrong -- They are victims of circumstance," the president wrote. "This is a Humanitarian gesture on behalf of the United States, Middle Eastern Countries but, in particular, the Country of Iran."

Trump claimed that his "representatives" were having "very positive discussions" with Iranian leadership, despite the fact that he said earlier Sunday that he reviewed their most recent peace proposal and that it is "not acceptable."

He said these discussions "could lead to something very positive for all" but warned that if Iran interferes with these safety efforts, they will "have to be dealt with forcefully."

-ABC News' Isabella Murray

Iran's Islamic Revolutionary Guard Corps issued a statement via the state-run Press TV claiming that the U.S.' room for decision-making "has narrowed" amid the ongoing negotiating stalemate.

In its statement, the IRGC claimed that Tehran has set the Pentagon a deadline to lift its blockade of Iranian ports. It also claimed that the global tone of conversation on the conflict has shifted "against Washington," citing critical statements on the war from China, Russia and Europe.

President Donald Trump, the IRGC said, must choose between "an impossible military operation or a bad deal" with Iran.

-ABC News' Dragana Jovanovic