One of my teachers was a Tibetan called the Tai Situ. He is less well known outside of Vajrayana circles than the Dalai Lama but very highly regarded within it.
On one occasion during a public talk he said that if you knew that a terrorist was in your town and had a bomb which he was going to detonate killing large numbers of people, then it is your Buddhist duty to do everything you can to stop him. Including causing physical injury that might kill him. He said that this would be our duty as a Buddhist and as a human being.
He said that we should be prepared to take on the kammic consequences of such an act, for the sake of others.
This is a teacher who lives a completely vegetarian ahimsic life.