Racing at Kempton was abandoned following a nasty incident involving four horses and jockeys in the third race of the afternoon.

The accident occurred as the field rounded the home turn in the Breeders Backing Racing EBF Maiden Fillies' Stakes.

Nellie Deen was tracking the pacesetting Madame Butterfly in the hands of Frederik Tylicki when the pair suffered a heavy fall.

Jim Crowley and Electrify were racing immediately behind and were brought down, as was Steve Drowne's mount Skara Mae.

A guard of honour for Stobart Champion Flat Jockey Jim Crowley at Ascot Racecourse two weeks ago (Getty)

Ted Durcan was also caught up in the melee and was unseated from Sovrano Dolce.

Drowne and Durcan returned to the weighing room, albeit walking gingerly, but Tylicki and Crowley were both being attended to on the track.

With racing having already been delayed for over an hour, Racing UK reported that both riders were being taken to St George's Hospital in Tooting, with Tylicki taken by air ambulance and Crowley by road ambulance.