21 Polo Horses Die Suddenly, Possibly Poisoned

05/21/2009 05:12 am ET | Updated May 25, 2011
  • ABC News

At least 21 horses have died after coming down with a mysterious ailment moments before they were scheduled to compete in the prestigious U.S. Open polo tournament.

Though the Florida Department of Agriculture was conducting lab tests to determine the cause of death, veterinarians said they suspected the horses were probably killed by some sort of poison.

Read more on ABC News