Champion British jockey Kieren Fallon, who was hospitalized overnight for treatment for injuries he sustained Wednesday when his mount was brought down in a four-horse pileup in the last race at the Royal Ascot meeting, reportedly has no broken bones.Fallon's agent, Dave Pollington, told Sporting Life the exact nature of Fallon's injuries are unknown, but that "nothing is broken. Kieren said that was feeling pretty unwell, but that he was up and reading the papers."Fallon was booked to ride six mounts on the "Ladies Day" card Thursday.The accident occurred when Prairie Falcon, one of 24 runners in the Ascot Stakes, slipped approaching the final turn, causing three other horses to fall. The fallen horses were Fallon's mount Alhawa, as well as Natural Eight and Generosa. The newspaper reported the horses all appeared to be uninjured.Seamus Heffernan, aboard Generosa, was not injured and Alan Daly, the rider of Natural Eight, was treated by paramedics at the scene. Michael Hills, the jockey of Prairie Falcon, was treated at the racetrack and Fallon was taken to the hospital after being treated for about 15 minutes while on the course.The 2 1/2-mile marathon was won by Barba Papa, with Seliana second and Heros Fatal third. Stewards conducted an inquiry as a result of the accident but no action was taken.