A horse died during training at the Del Mar racetrack Sunday, injuring jockey Victor Espinoza.

Kona Gold Stakes winner Bobby Abu Dhabi went into cardiac arrest on the track, Brian Trump tweeted with a photo of the Thorougbred and Espinoza at Santa Anita Park earlier this year. Trump is the son-in-law of the horse’s owner, Gary Hartunian.

Espinoza, who won the 2015 Triple Crown on American Pharaoh, sustained fractured vertebrae and injuries to his neck and left arm, according to Jeff Furmanski, a spokesman for the Del Mar Thoroughbred Club. Espinoza reported numbness in his left arm, but he has regained some feeling and had no paralysis of movement.

The Hall of Fame jockey was being treated at Scripps Memorial Hospital La Jolla, where he will remain overnight, Furmanski said.

Trump, who is also the racing manager at Hartunian’s Sherman Oaks-based Rockingham Ranch, tweeted: “While we are deeply saddened and hearbroken by this loss our thoughts are currently with HOF jockey @VictorEspinoza.

–City News Service, staff