The Hardwicke Stakes winning horse, Thomas Chippendale, has died after victory on the final day of Royal Ascot.
Trained by Lady Cecil, Thomas Chippendale had been ridden by Johnny Murtagh. The four-year-old horse collapsed and was pronounced dead on the racetrack after a suspected heart attack.
Thomas Chippendale had won three races in 10 starts, including last year's King Edward VII Stakes at Royal Ascot.
"He ran his heart out and was pulled up at the line," Murtagh told the BBC.
"He lost his balance and I don't know what happened to him.
"It's heart-breaking for everyone involved - it should have been a great win.
"It's just devastating the way it's finished."
Lady Cecil said: "It was devastating, but at least it was quick and he wouldn't have felt anything.
"We didn't realise the horse had collapsed, so we came from the grandstand into the winner's enclosure feeling so happy and couldn't understand why it was rather quiet."