A 17-year-old Formula 4 driver has had both of his legs amputated after "one of the most horrific crashes motorsport has ever seen".
Billy Monger was left in a critical condition after the crash with a fellow racer's car at Donington Park, Derbyshire, on Sunday.
The Derby Telegraph reports he was trapped in his vehicle for more than 90 minutes following the high-speed smash, before he was flown to hospital.
Doctors at Queen's Medical Centre in Nottingham have kept the teenager in an induced coma and he is expected to be woken up in a few days, according to a Formula 4 statement.
It added: "The medical team there are pleased that all Billy's vital signs are showing progress and going in the right direction.
"Due to the injuries sustained and despite every effort, Billy has sadly had both lower legs amputated.
"Billy's family would like to express their gratitude for the first-class medical attention given by Queen's Medical Centre in Nottingham and take this opportunity to thank the medical teams, marshals, extrication crews and air ambulance staff for their skilled response and hard work.
"Furthermore, they would like to thank Billy's colleagues, friends, fans and everyone who has demonstrated their affection for him over the past few days.
"These messages help give the great strength needed for the recovery process that lies ahead."
Billy, who refers to himself on Twitter as Billy The Whizz, writes on his website that he has been crowned British Champion twice but "for 2017 it's my time to become the British F4 Champion".
A JustGiving crowdfunding page has been set up to help Billy, from Charlwood, Surrey, beat "life changing injuries" after what it described as "one of the most horrific crashes motorsport has ever seen".
It has already raised more than £500,000 - well over its £260,000 target.
A statement on the page attributed to the Monger family and his team among others describes Billy as "truly special" and an "extremely talented" driver.
It adds: "Having always been a fighter Billy has already overcome big hurdles in his career - struggling for budget Billy has fought his way into top flight Motorsport.
"However, we now need your kindness and support to help give Billy and his family the best chance to fight these injuries that will affect Billy's life so massively."
The crash happened during round six of the British Formula 4 Championship.