One horse has died and three jockeys have been injured in a race under the floodlights at Wolverhampton.
Richard Kingscote is undergoing treatment in hospital for arm and rib injuries after Thursday's accident.
Former champion jockey Paul Hanagan has a suspected broken collarbone and Freddy Tylicki a possible broken nose.
The David Nicholls-trained Fitz Flyer, whose fall as it rounded the home turn in the claiming stakes caused the incident, suffered a fatal injury.
Wolverhampton's clerk of the course, Fergus Cameron, said that jockey Kingscote was the most seriously hurt.
Cameron said: "He has been referred to New Cross Hospital in Wolverhampton. He's been taken by ambulance."