Jockeys Tegan Harrison, Luke Rolls and Mikayla Weir were all dislodged from their mounts after passing the winning post following Race 4 at Grafton.
Tegan was unconscious and has since regained consciousness. Tegan has sustained a head injury and will be transported to hospital for further assessment.
Luke Rolls has a sore wrist and pain to his neck. He is back in the jockey's room now awaiting further assessment but will fulfill no further rides today.
Mikayla Weir was winded and sustained a small abrasion on her forehead, but appears otherwise fine.