The Washington Post, citing reviewed documents, reported that a threat by the Islamic Republic to kill Donald Trump in the past month led the U.S. president to leave Turkey in an unprecedented and covert operation with a military aircraft.

The newspaper wrote that, despite the White House’s announcement that Trump flew on the “Air Force One,” he was transferred in secret after getting aboard in front of cameras, from the airport food transport truck to a smaller U.S. Air Force aircraft.

Mehdi Jaddi-Nia, a member of the Iran International editorial staff, reports