U.S. President Donald Trump called off planned military action against Iran after diplomatic contacts, logistical constraints and strong objections from key regional allies combined to stall the operation, Axios reported on Sunday.

"It was really close. The military was in a position to do something really fast," a U.S. official told the outlet, describing the intensity of the situation.

While the administration and various Middle Eastern countries expected an imminent operation following a Tuesday meeting, the order never came.

Trump had initially narrowed down military options against Iranian targets but hesitated as complications surfaced.

One reason that influenced the reversal was a shift of US military assets toward the Caribbean and Asia that left the Middle East insufficiently prepared, with officials noting that "the theater was not ready," limiting available options.

A decisive factor was a backchannel exchange between U.S. envoy Steve Witkoff and Iranian Foreign Minister Abbas Araghchi. On Wednesday morning, Araghchi reportedly messaged Witkoff, committing to stop the killing and halt the scheduled execution of protesters.

Furthermore, Israeli Prime Minister Benjamin Netanyahu reportedly cautioned Trump that Israel was unprepared for Iranian retaliation and argued the proposed U.S. plan lacked sufficient strength. Similarly, Saudi Crown Prince Mohammed bin Salman expressed deep concerns regarding the potential impact on regional stability.

By Wednesday afternoon, it became clear the strike order would not come, the U.S. officials said.

Trump has repeatedly voiced support for Iranian protesters and sharply criticized authorities' handling of demonstrations that began on Dec. 28 in Tehran over economic conditions.

The U.S. president previously indicated he could launch strikes if Iran responded with lethal force.