Authorities have started handing over remains of the victims of one of India’s worst aviation disasters after identifying some through DNA tests.

India’s government is urgently inspecting all Boeing 787s after a devastating Air India crash that claimed at least 270 lives this week, the aviation minister said on Saturday, adding that the authorities were investigating all possible causes.

The deadly crash of an Air India flight carrying more than 240 people on Thursday arrives after years of efforts to turn around the country’s flag carrier — which had been plagued by tragedy and financial losses under prior state ownership.