One horse threw his head and crashed into a crowd of horses going in the opposite direction . Routine training exercises turned deadly Saturday morning when two racehorses collided at Belmont Park in New York , killing both animals and injuring one rider , officials told CNN . Six Drivers and Caixa both died instantly , and a rider was taken to a hospital . Caixa II , a year - old , won seven stakes races and $ 1.8 million in his career .
One horse threw his head and crashed into a crowd of horses going in the opposite direction . Six Drivers and Caixa both died instantly , and a rider was taken to a hospital . Caixa II , a year - old , won seven stakes races and $ 1.8 million in his career .