Donald Trump, the United States president, took a secret military flight from Turkey last month in an operation that involved him being moved between aircraft in a catering truck, an extraordinary deception prompted by an Iranian assassination threat, the Washington Post reported.

The White House said at the time that the president was ​flying aboard Air Force One from Turkey, where he had attended a NATO summit, to Britain. But moments after Trump had boarded the ‌plane, he left it in secret via the catering truck and boarded another aircraft for the flight to Britain, the Post said on Monday, quoting unnamed sources.

The New York Times carried a similar report, quoting unnamed U.S. officials.

Trump had taken a newly renovated Qatari-donated jet to Ankara for the NATO summit but unexpectedly announced he would use an older Air Force One when departing the country, ​a move that prompted questions about the newer plane’s security.

The trip to NATO was the first international travel for the new plane, whose speedy upgrades ​triggered questions over its cost and security, and took place as hostilities escalated with Iran, which borders Turkey.