Swiss Moto3 rider, 19, dies after sustaining injuries in a crash
- Dupasquier fell and was struck by another bike
- Doctors rushed to the scene, and after examining, he was airlifted to a hospital
- The teenager underwent chest surgery for a vascular lesion and suffered brain damage
"We're deeply saddened to report the loss of Jason Dupasquier," MotoGP said on Twitter.
"On behalf of the entire MotoGP family, we send our love to his team, his family and loved ones. You will be sorely missed, Jason. Ride in peace," the statement added.
Dupasquier, in his second season in Moto3, fell and was struck by another bike, before sliding along the track, during Saturday qualifying.
Doctors rushed to the scene and after attending to him for 40 minutes on the circuit had him airlifted to Florence's Careggi hospital.
The teenager underwent chest surgery overnight "for a vascular lesion" and had suffered "severe brain damage", a hospital spokesman told AFP earlier Sunday.
His team, Pruestel GP, had already pulled out of Sunday's race.