A melee in Golden Gate Park left a mounted police officer and a dog owner injured, a dog with a bullet wound and a horse badly mauled.
The wild scene began Sunday when a woman illegally let her pit bull off its leash, said Sgt. Neville Gittens, a San Francisco Police Department spokesman.
Sgt. David Herrera, mounted on a police horse known as "AAA Andy," yelled at her to leash the dog, but the dog attacked his steed.
Herrera was tossed to the ground and the dog owner was kicked in the face by the horse.
The horse took off with the dog in pursuit.
Another officer spotted the dog and fired two shots as it resumed its attack. One hit the animal, and it ran into some bushes.
Herrera was treated for back and neck injuries. The woman had head injuries and a broken finger.