The Air India flight fell from the sky on Thursday and killed at least 270 people in Gujarat state, officials said Saturday.

Although all but one of the 242 onboard the Air India Boeing 787 died following the crash, it is thought the death toll of those on the ground - said to be 29 - could have been greater

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.