Three weeks after an Air India Boeing 787 crashed, investigators are still piecing together what went wrong. In the meantime, aviation safety experts have begun to narrow their thinking.

The investigation into the Air India Flight AI-171 crash, which claimed 260 lives, has expanded to include the possibility of sabotageBlack box data recovered from the wreckage is being analysed by Indian and US aviation experts to determine the causeAuthorities are examining every angle,

Investigators probing the deadly Air India crash on June 12 have confirmed that sabotage has not been ruled out. Some 274 victims were killed when the Boeing 787-8 Dreamliner plunged into a building, shortly after it took off from Ahmedabad Airport in India on its journey to London Gatwick in the United Kingdom.