An Air India Boeing 787-8 flight headed for New Delhi returned to Hong Kong shortly after takeoff Monday because of a "technical issue," Indian media reported.

Global probe underway into Air India Ahmedabad crash that killed 241. Boeing, NTSB, and FAA join AAIB as black box data is analyzed. DNA matches confirm 92 victims; rescue efforts praised.

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.