The German Air Force scrambled two Eurofighter Typhoons to escort the Jet Airways flight after it suddenly cut off radio contact as it flew over the country.
The incident was sparked as the Boeing 777-300 switched radio contact from Bratislava ground control to the Czech capital of Prague.
But now footage released by a commercial pilot on board a trailing British Airways flight has shown something else flying alongside the jets .
Eagle-eyed social media users pointed out a mystery UFO speeding past the three planes - which even appears to be flying at double the speed.