Iran issued a notice to airmen (NOTAM) late Wednesday, applying to all flights except those with prior authorization from the country.

The airspace closure is scheduled to last slightly more than two hours.

According to the Flight Radar 24 website, tracking data indicated several aircraft were either turned away or diverted around Iranian airspace.

Shortly afterward, U.S. diplomatic posts in Jerusalem, Qatar, and Kuwait released security warnings urging “increased caution,” restricting non-essential travel to Al Udeid Air Base, and pausing access to facilities at Camp Arifjan, Camp Buehring, Ali Al Salem Air Base, and Camp Patrio.

The U.K. Foreign, Commonwealth & Development Office (FCDO) similarly published guidance advising against “all but essential travel to Israel.”

“There is a heightened risk of regional tension,” the advisory stated. “Escalation could lead to travel disruption and other unanticipated impacts.”

A U.S. official confirmed Wednesday that the Department of Defense was relocating personnel due to increasing tensions.

“All the signals indicate a U.S. attack is imminent, but that is also how this administration operates to keep everyone alert. Unpredictability is part of the strategy,” a Western military official told the outlet.

Hours prior to the NOTAM, President Trump informed reporters from the Oval Office that the killing of protesters in Iran had ceased.

“We’ve been told that the killing in Iran is stopping, and it’s stopped and stopping, and there’s no plan for executions or an execution,” Trump said. “So, I’ve been told that on good authority. We’ll find out about.”

When questioned about potential action against the country, Trump responded, “We’re going to watch and see what the process is.

“We were given a very good, very good statement by people that are aware of what’s going on.”

The Iranian regime has faced recent criticism, with reports indicating over 3,000 fatalities during nationwide demonstrations against economic hardship and political oppression.

Trump stated Tuesday he would sanction Iranian officials until the killings ended.

In a Wednesday statement, the National Council of Resistance of Iran (NCRI) asserted that Supreme Leader Khamenei, via the Revolutionary Guard Corps (IRGC), “has turned his weapons against our people, while young Iranians, armed with little more than determination, have risen to defend and protect unarmed and innocent civilians.”

“In this ruthless confrontation, in which thousands of innocent Iranians have been killed over the past two weeks, neutrality is not an option,” NCRI president-elect Maryam Rajavi wrote on X. “At a minimum, the international community must recognize the legitimate struggle of Iran’s youth and Resistance Units against the #IRGC to bring an end to this regime.

“European governments must designate the IRGC as a terrorist organization, an action long overdue. The regime’s embassies and representative offices should be closed, and its envoys expelled.”

Later, Iran’s ambassador to the United Nations sent a letter to the UN, alleging that Iranian protesters were “deliberately inciting violence” and “equipping terrorist and armed groups to turn peaceful protests into political destabilization.”

Israel’s UN Ambassador, Danny Danon, posted the letter on X, describing it as “beyond belief.”

“This is the same regime that shoots protesters, hangs opponents, and oppresses an entire people,” Danon wrote. “These are nothing but crocodile tears from a murderous regime.”

Emma Colton of Digital contributed to this report.

This is a developing story. Please check back for updates.