Vishwash Kumar Ramesh, a British national, appears to be the only survivor of Air India flight 171, which crashed with 242 people aboard.

It seemed impossible, but shortly after news broke that an Air India flight had crashed in the city of Ahmedabad, video started circulating on social media showing a man walking from the scene in a bloodstained shirt.

There have been cases of a very small number of survivors in very serious accidents, but it is "very rare" for there to be only one, a professor told Newsweek.