City On Line was euthanized after he fractured his femur in a post parade accident prior to the fifth race on Wednesday at Belmont Park.

The four-year-old City Zip colt broke away from his lead pony, unseated jockey Jose Lezcano, and ran loose down the tunnel leading to the paddock where he ran into a bronze statue.

Anthony Verderosa, D.V.M., chief examining veterinarian for the New York Racing Association, sedated the colt and treated him for trauma in the paddock. During the evaluation, Verderosa diagnosed the fracture to the femur, a large bone in the hind leg.

City On Line won two of 14 starts for owner Stromboli Farm and trainer Allen Jerkens. He was produced by the winning Stop the Music mare Bebe Ani.

Neither Lezcano nor any others horses were injured during in the incident.