Mexico City’s local congress on Tuesday passed a measure aiming to make bullfights much less harmful to bulls and matadors, a move applauded by animal rights activists but sharply criticized by fans of the centuries-old tradition.

Mexico City lawmakers on Tuesday voted overwhelmingly to ban violent bullfighting, triggering outrage from aficionados and celebration from animal rights advocates.

Showdowns between people and bulls can still go on, but the animals can no longer be hurt or killed. Some bullfighting proponents said the law imperils an ancient tradition.