US President Donald Trump secretly flew out of last month’s NATO summit in Ankara, Turkiye, on an alternate military aircraft while the White House made it appear that the Republican president was flying on Air Force One, according to a report published by The Washington Post on Monday.

Axar.az informs, citing The Associated Press, that the Post said the operation was prompted by an Iranian assassination threat against Trump. The ruse was carried out as journalists and some White House staff members were led to believe they were on the same plane as the president as he began his journey back to Washington from the annual gathering of NATO country leaders.

The Post cited material reviewed by the newspaper, a U.S. official familiar with the operation and another person with knowledge of the president’s travel.

Trump had flown to the summit in a new Qatari-gifted and retrofitted red, white and navy blue jet. But ahead of departing Turkiye, he said he would fly partway home on an older-model baby blue Air Force One plane instead.

The president at the time said the new luxury jet was being flown out ahead of his departure from Ankara to give some U.S. troops based in eastern England a chance to check out the new Air Force One.

In Ankara, Trump boarded the old Air Force One jumbo jet in view of television cameras ahead of the plane flying to Royal Air Force Mildenhall in the United Kingdom.