In a social media post, officials at Fort Belvoir, an Army post just outside Washington in northern Virginia, said personnel could expect delays at access points “for the next 30 days.” (Eric Kayne/Stars and Stripes)

U.S. Northern Command ordered “heightened security” at all military installations in the United States, including in Alaska and Hawaii, over the weekend after the U.S. and Israel launched new combat operations against Iran.

Air Force Gen. Gregory Guillot, the NORTHCOM commander, ordered bases to implement security measures including random vehicle inspections and identification checks of 100% of the people entering installations, according to the military. He also ordered the temporary suspension of the Trusted Traveler Program, which allows certain Defense Department civilian employees, service members and their dependents to escort people onto installations in their vehicles without a background check.

Military installations across the United States shared the increased measures on social media and through other channels. Several warned that personnel should expect delays at base gates.

The new measures come amid the bombing campaign unleashed Saturday morning against Iran which has seen the Islamist state retaliate with strikes of its own against U.S. and Israeli targets across the Middle East. Four U.S. service members were killed when an Iranian missile evaded American air defenses, the Pentagon said Monday. Officials have not disclosed where that incident occurred.

Though Iran does not have the military capability to attack the U.S. homeland, U.S. officials have cautioned that the new combat campaign could inspire terrorist-style attacks in the states, and military posts have previously been targets, including during the Global War on Terror.

FBI Director Kash Patel announced Sunday that he had instructed FBI counterterrorism and intelligence teams to maintain “high alert” during the conflict.

Neither NORTHCOM nor other U.S. government agencies indicated there was a known threat on military installations. NORTHCOM did not immediately respond to requests for further information about the heightened security measures Monday morning.

It was not immediately clear how long the increased security at military installations could last.

Defense Secretary Pete Hegseth told reporters at the Pentagon on Monday that combat operations would continue as long as President Donald Trump sees a need for them, saying he would “never hang a time frame” on them. Trump told the New York Times Sunday he expected strikes would continue at least “four to five weeks.”