Ana O'Brien was taken to hospital by air ambulance to Cork University Hospital after a fall at Killarney this evening.

O'Brien, the daughter of trainer Aidan O'Brien, was quickly attended to after her mount Druids Cross trained by her brother Joseph, slipped up over two furlongs out in the Celtic Steps The Show At Killarney Racecourse Rated Race, the second contest on the card which was run at 6.20pm.

The three-year-old Druids Cross was fatally injured, while O'Brien was taken off the track in an ambulance before being transferred, the Irish Coast Guard air ambulance arriving at 7.45pm and landing on the golf course.

The third race was delayed for well over an hour as a result.

Val O'Connell, Clerk Of Course, said: "She was conscious leaving the track and was airlifted to Cork University Hospital."

O'Brien, 21, rode in both the English and Irish Derbys for her father this season and partnered her first winner as a 16-year-old at Dundalk in February, 2013.