A U.S. military charter aircraft flying from Afghanistan has been forced down in Iran by Iranian fighter jets, according to officials familiar with the incident.

The plane, which departed Bagram air base on Friday, was chartered by the Pentagon from Fly Dubai, an airliner based in the United Arab Emirates, and was carrying approximately 100 Americans and possibly a pair of Canadians. After being intercepted by the fighter jets, the plane was escorted to the southern Iranian city of Bandar Abbas.