Kris Lees-trained Lomazzo was put down on Saturday after fracturing a seasmoid in the Magic Millions Country Cup at the Gold Coast.
The five-year-old Newcastle-based gelding, by Magic Albert from Graphite Lass, was taken from the track to the nearby Gold Coast Equine Hospital after pulling up around 250 metres from the finish line and falling behind the field to run last.
Lomazzo, with $117,080 prizemoney featuring two wins from 22 starts, did not recover from the injury.
A woman was later arrested after attempting to steal the ambulance that took Lomazzo to the hospital.
She was charged with offences including unlawful use of a motor vehicle and public nuisance.
Reportedly she was drunk and not a protester.
The incident delayed the next race.
Zafina won the $242,500 Country Cup (1200m) by 0.2 lengths from Suggan Buggan and He’s A Moral.
Not Surprising, Lees’ other horse in the same race, was fourth.
Elsewhere on the card for Lees, chestnut filly Sasso Corbaro ran sixth in the $2million 3YO Guineas (1400m) while Powerline was 13th in the $1million Magic Millions Cup (1400m).
The Hunter’s hope in the $2million 2YO Classic (1200m), David Atkins-trained Jonker, ended up last after being controversially knocked into the rail early in the contest.
Meanwhile, Singleton-raised and Lambton-based jockey Aaron Bullock claimed his first metropolitan winner on Saturday. It was on board Lees-trained Sugar Bella.