Three more horses at Vernon Downs have tested positive for Equine Herpes Virus-1.

One of the horses was euthanized, while the other two are under quarantine in two barns at the racetrack.

Live racing at Vernon Downs was canceled on Saturday after the discovery of a horse carrying the contagious viral disease.

The suspension of racing at Vernon will continue as the state Department of Agriculture, State Gaming Commission and track management work to assess and contain the outbreak.

As of Monday, no other horses at New York racetracks have been reported to have EHV-1.