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.

Air India has finalized enhanced inspections on 22 Boeing 787 aircraft in its fleet following last week’s crash. The airline operates 33 Dreamliners, with the first acquisition dating back to 2012. The aircraft involved in the incident had been operational since 2014.

Officials say at least 270 bodies have been recovered, while the lone surviving passenger is still under observation for some of his injuries.