After a third horse died in connection with the racetrack drama "Luck," HBO has suspended filming with the animals as the death is investigated, according to the Associated Press.
The horse was being led to a racetrack stable by a groom when it reared and fell back, causing a head injury, the story says. The animal was later euthanized at the track, where "Luck" is taping its second season.
During the first season’s filming, two horses were injured and euthanized, causing HBO to defend its treatment of the animals and to work with the American Humane Association and experts to put safety protocols in place.
The injury suffered in the most recent case is common in stable areas, according to Dr. Rick Arthur, medical director of California’s racing board, the piece adds.
HBO said it was "deeply saddened" by the death and was working with the AHA on its inquiry.