A steer had to be euthanized after it was severely injured in a Saturday steer wrestling event.

Officials with the Calgary Stampede say the accident happened during what appeared to be a normal run. The steer was seen to have difficulty standing after the event and veterinarians were brought out to assess the animal.

Stampede officials determined the steer's injuries were untreatable and it was euthanized shortly after.

"You never want to see something like this," said the steer wrestler, Casey Martin. "I run horned cattle on my ranch and I throw them down often to do medical and field doctoring When I realized this steer was injured I held him still to prevent any further injury."

Steer wrestling is when a cowboy races alongside a steer and then tackles it from atop a horse.

The Calgary Stampede recently changed the rules around steer wrestling, preventing "dog falls."

Cowboys competing in the event can no longer continue to wrestle a steer that has splayed its legs and cannot fall safely.

However, officials say a dog fall does not appear to have taken place in this case.

The Calgary Stampede says it will now do a thorough review to try and find out if there were contributing factors to the incident that could have been prevented.

This is the second time in two years that a steer has died during the steer wrestling event.