BALTIMORE (CBS/AP) — In a tragic start to Preakness day, two horses died at Pimlico Race Course and a jockey broke a collarbone after a spill on a damp, rainy Saturday.

Pramedya broke down around the turn in the fourth race, tumbled to the ground as jockey Daniel Centeno was thrown to the turf. Pimlico racing officials said the 4-year-old filly was euthanized on the track after breaking her left front cannon bone.

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Centeno was driven off in ambulance. Officials said he broke his right collarbone.

Pramedya’s owners, Roy and Gretchen Jackson of Lael Stables in West Grove, Chester County, also owned Barbaro, who won the 2006 Kentucky Derby before breaking his leg two weeks later in the Preakness.

In the opening race of the day, Homeboykris collapsed and died after winning and having his picture taken in the winner’s circle. Track officials believe the 9-year-old gelding suffered cardiovascular collapse.

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The horse will be taken to the University of Pennsylvania’s New Bolton Center  for an autopsy.

Homeboykris won the Champagne Stakes in 2009, and a year later finished 16th in the Kentucky Derby. He had just won his 14th race in 63 career starts.

Later Saturday, Kentucky Derby winner Nyquist takes on 10 rivals in the Preakness Stakes.

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