Two German fighter jets intercepted a London-bound airliner after air traffic control lost radio contact with the pilot.

Jet Airways flight 9W 118, carrying 330 passengers and a crew of 15 from Mumbai to London Heathrow, was over Cologne when radio contact abruptly stopped.

The German Air Force scrambled two Eurofighter Typhoons to escort the Boeing 777-300, which is thought to have tuned in at the wrong radio frequency.

Footage captured from a British Airways plane flying 2,000 feet above 9W 118 shows the fighters flying alongside the Indian passenger jet

The German Air Force scrambled two Eurofighter Typhoons to escort the Boeing 777-300, which is thought to have tuned in at the wrong radio frequency

Jet Airways flight 9W 118, carrying 330 passengers and a crew of 15 from Mumbai to London Heathrow, was over Germany when radio contact abruptly stopped

Footage captured from a British Airways plane flying 2,000 feet above 9W 118 shows the fighters flying alongside the Indian passenger jet.

The plane continued along its planned flight path and the fighter pilots managed to restore radio contact just north of Nuremberg using emergency channels.

As a precaution, the two Typhoons continued to escort the plane until it made a safe landing at London Heathrow.

Two men filming from the British Airways plane behind can be heard saying, 'There they are', when they spot the planes.

But that is not the end of the story, if some online commenters are to be believed.

They have pointed out that at around one minute and 30 seconds into the video you can see a small dark object moving faster than the other aeroplanes.

It is first spotted to the left of the Eurofighter Typhoons before moving into the top right corner of the screen.

Sceptics said the blip is merely the shadow of another aircraft, but some UFO enthusiasts are not convinced.

Eurofighter Typhoons are used by the RAF as well as the German Air Force.

CirrusPilot wrote on his Facebook page: 'This incredible footage shows the German Air Force intercepting a Jet Airways 777-300ER bound for London (from Mumbai) yesterday after it failed to respond on the appropriate ATC frequencies.

'The trailing British Airways plane captured the footage near Cologne, Germany.'

The fighters soon managed to establish contact with the Jet Airways plane, which had set off from Mumbai, and soon returned to base

UFO enthusiasts have pointed out that at around one minute and 30 seconds into the video you can see a small dark object (circled) moving faster than the other aeroplanes

File photo of a Jet Airways Boeing 777 coming in to land. Jet Airways confirmed in a statement that radio contact had been briefly lost while flight 9W 118 was over German airspace

Speaking about the sighting of what some people think it a UFO, he said: 'Many commenters have noted that at the 1min 30sec mark of the video there is a small dark object.

'The object is moving faster than the other traffic.

'It originates far to the left of the Euro Fighter and takes a 45 degree angle direction towards the North East of the video shot.

'Perhaps a shadow of another aircraft crossing above.'

Jet Airways said in a statement: 'Contact between Jet Airways flight 9W 118, from Mumbai to London's Heathrow Airport and the local ATC, was briefly lost while flying over German airspace.

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'Communication was safely restored within a few minutes.

'As a precaution, the German Air Force deployed its aircraft to ensure the safety of the flight and its guests.

'The flight with 330 guests and 15 crew subsequently landed at London.'

Typhoons are regularly scrambled by the RAF in British airspace. On February 7, two jets were dispatched to meet Pakistan International Airlines flight PK757.

The plane was accompanied by Typhoons to the Essex airport, with photos posted on Twitter showing several fire engines and a number of ambulances waiting on the ground.

An airline spokesman said UK authorities had 'received some vague security threat through an anonymous phone call'.

Passenger Naz Amin said the flight landed 'in the middle of nowhere' and was quickly surrounded by police.

'I realised it was surrounded by police and the police came on the plane about 45 minutes to an hour later and they took a gentleman off the plane,' he told LBC Radio.

This photo, taken in 2001, shows a test model of a German Eurofighter Typhoon taking off at Manching in Bavaria

A German Typhoon flies over Mosnov Airport in Russia. Picture taken in September 2016

Typhoons are regularly scrambled by the RAF in British airspace. On February 7, two jets were dispatched to meet Pakistan International Airlines flight PK757(pictured)

'He wasn't being disruptive at all, he was just sitting down... there was no-one being disruptive on the plane.'

Essex Police said the incident is 'not believed to be a hijack situation or terror matter'.

Stansted is a designated airport for dealing with hijacks and major security alerts.

Incidents are dealt with in a remote part of the airfield to the north west of the terminal building.