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.

Four days after the devastating crash of Air India flight AI-171 en route from Ahmedabad to London, authorities have confirmed that 144 DNA samples have been successfully matched as of noon Tuesday, according to Gujarat Minister of State for Home,

Authorities have started handing over remains of the victims of one of India’s worst aviation disasters after identifying some through DNA tests, days after the Air India flight crashed and killed at least 270 people in Gujarat state,