An investigation is underway as to what caused an Air India airliner carrying 230 passengers and 12 crew members to crash shortly after takeoff on Thursday.

Air India's deadly plane crash that killed at least 270 people has triggered a wave of speculation about what led to the world's worst aviation disaster in a decade, but authorities are slowly narrowing down areas of investigation.

Doctors in India say 270 bodies have been recovered from the site of Thursday's plane crash in Ahmedabad. The London-bound aircraft crashed into a residential area shortly after take-off killing all but one of the 242 passengers and crew members, a 40-year-old British man.