A craft matching the description of the USS Nimitz UFO was spotted by a US Navy submarine hurtling at 550mph through the water in a previously unrevealed encounter, a former US Air Force intelligence expert has claimed.

The sighting of a 'tic-tac' craft by two US Navy fighter jets in 2004 has become one of the most famous UFO videos of all time.

The US Navy is still unable to explain the object, previously identifying it as an Unidentified Aerial Phenomena.

But Mike Turber, an intelligence expert who claims to have worked in the USAF, claims the craft was actually created by the US military.

He first made his bombshell comments on The Hidden Truth Show with Jim Breslo.