Three jockeys were injured at Rosecroft Raceway in Oxon Hill, Md., Tuesday night.
In the fifth race about 9 p.m., Pinderonabender, the lead horse driven by William Carter, took a bad step that triggered the chain reaction accident and involved seven of the nine horses and their carts.
Two jockeys lost consciousness.
Two were flown to a trauma center by Maryland State Police helicopter. They were conscious upon transport. A third was taken by ground to a trauma center.
All three were considered to be in serious condition, but none of the injuries is believed to be life-threatening.
Carter needed stitches around his ears and suffered three fractured vertebrae. Donnie Russell suffered a separated collarbone, which was reset, and has an internal wrist fracture. He was scheduled for surgery Wednesday. Justin Hite suffered a cracked heel and a broken bone on the top of his foot.
The other drivers involved in the accident were treated at Rosecroft.
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None of the horses was injured.
Firefighters and paramedics were clear of the scene by 9 p.m.
Rosecroft has live harness racing Tuesday nights. Racing resumed after the crash.
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