If you were looking into the night sky yesterday evening, you may have seen something unusual.
At around 8pm, many in North London and Hertfordshire reported seeing three planes - one larger one flanked by two smaller ones - flying overhead and circling around a number of times. With the tenth anniversary of 9/11 on Sunday, it is not surprising that the social network was soon aflame with possible explanations, some more serious than others.
Sky News reported a "twitter meltdown" as comedian Matt Rudge pointed the finger at Air Force One or Gaddafi and others suggested technical faults, terrorism, diversions or that the aircraft were two fighter jets accompanying a commercial flight.
We await the official facts behind these mysterious planes.
Picture (c) Steven Kelly