Three soldiers and four horses at Joint Base Myer-Henderson Hall, Va., were injured Monday afternoon during a training exercise, the Army confirmed.

Horses at Joint Base Myer-Henderson Hall (JBM-HH) briefly got loose during a training event on the Arlington, Virginia installation, sending two people to the hospital, according to Arlington County and base officials Monday evening.

At around 2 p.m. Monday, the caisson detachment was conducting a "desensitization ride" when three horses unseated their riders.

Several people have been injured, one seriously, after horses escaped on Joint Base Myer-Henderson Hall this afternoon, according to initial reports. Arlington County police were initially dispatched to check along Route 50 near Courthouse for possible sightings of the escaped horses.