French motorcyclist Fabrice Miguet has died in hospital following a crash at Saturday's Ulster Grand Prix meeting.
Miguet had been in a critical condition for two days after crashing in the opening Superstock race at the Northern Ireland event.
The crash occurred at the Joey's Windmill Section of the course on the fourth lap and racing had to be halted for over an hour.
This afternoon, it was confirmed that Miguet had passed away from his injuries.
Noel Johnston, Clerk of the Course at the Ulster Grand Prix said: "Fabrice Miguet has now passed away due to the injuries he sustained at the Ulster Grand Prix on Saturday.
"I've known Fabrice, or MIG as he's known to many, for over 20 years, even before I became Clerk of the Course at the UGP. He'd been racing at Dundrod for a long time, and was a big character who had become part of the fabric of the event.
"We have been in constant contact with his team and family since Saturday, both directly and via local authorities, and I am extremely saddened to know that he has succumbed to his injuries.
"Our thoughts are with Fabrice's parents and the Optimark team, as well his wider circle of family and friends as they come to terms with their loss."
Miguet was aged 49, from Normandy in France. He was a regular competitor at the Ulster Grand Prix and Isle of Man TT.