The odd-shaped "black craft" with several lights apparently on its underside is said to have been videod and photographed by a father and son who were just leaving a restaurant near the border of Ohio and Kentucky in the USA at around 7pm (local time) on Saturday

The pair, named only as Tom and Christopher, allegedly then said five minutes later two "military helicopters" followed in the same direction.

In the video taken by dad Tom, the "craft" is seen to slowly glide past, but as it nears the horizon two small flashes of light are seen away from it and on either side.

The alleged photographs are much clearer and show the aerodynamic shape and the lights on the underside.