Investigators in India are studying the black boxes of a Boeing 787 Dreamliner after recovering them from the aircraft wreckage to ascertain the cause of last week’s plane crash that left at least 270 people dead.

India's aviation safety watchdog has asked Air India for the training records of the pilots and dispatcher for the plane that crashed last week as part of its investigation into the incident that killed at least 271 people,

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