According to The New York Times and The Wall Street Journal, the plane was an F-15E fighter plane, with a crew of one pilot and a weapons-systems officer sitting in the back seat.
CNN also said that an analysis of what Iranian media said were photographs of the wreckage showed that the F-35 was an F-15 rather than a stealth fighter as claimed in some Iranian reports.
American media reported that President Donald Trump has been informed about the situation.