Jules Bianchi has been seriously hurt in an incident that brought Sunday's rain-affected Japanese grand prix to a sombre close.
Adrian Sutil crashed on the wet Suzuka circuit, which brought out a recovery vehicle.
Sutil told reporters Marussia driver Bianchi, a 25-year-old Frenchman and the leading Ferrari 'academy' talent, then crashed sideways into the vehicle.
The FIA made the call to stop the race, which had earlier been interrupted with the safety car amid the difficult conditions.
According to Le Figaro, Bianchi, unconscious, was transported to the Mie hospital near Suzuka by ambulance with a police escort, because the medical helicopter could not take off.
Bianchi, who suffered from cerebral hematoma, is now undergoing surgery for a "severe head injury", F1's governing body has announced.
His father has told the L'Equipe sports daily that his son is in a "critical" condition.
After the surgery, "he will be moved to intensive care where he will be monitored," the FIA statement said.
Video replays of Bianchi's crash were ordered not to be shown or released by F1 race director Charlie Whiting.
Germany's Auto Motor und Sport claims that in the impact, the entire left side of Bianchi's Marussia was destroyed, including the crash structure and roll-bar.
"I've never seen such a badly damaged car," said one eyewitness who was at the scene.