At least 290 people have died after an Air India plane crashed shortly after take off from Ahmedabad airport in India on Thursday, a senior doctor at the Ahmedabad Civil Hospital, where a majority of the dead and injured people were taken, told CNN.

AHMEDABAD, India — The Air India plane crash this week was one of India’s worst aviation disasters, killing 241 people on board and several people on the ground. Indian authorities said Friday the investigation into the crash was underway and is expected to include experts from the plane’s maker Boeing and U.S. aviation regulators.

Air India flight AI171, a Boeing 787-8 carrying 242 people, crashed after taking off from Ahmedabad on its way to London.