The brutal killings come only two weeks after a French teacher was decapitated outside his school north of Paris by an Islamist extremist A knife attacker killed three people, cutting the throat of at least one woman, inside a church in Nice on the French Riviera on Thursday. The brutal killings come only two weeks after a French teacher was decapitated outside his school north of Paris by an Islamist extremist – the teacher had shown his pupils cartoons of the Prophet Mohammed during a lesson on freedom of speech.