French police find the bodies of eight new-born babies in the village of Villers-au-Tertre in north-east of France.
Three police officers are killed and a fourth wounded after they responded to a domestic violence incident in Saint-Just, Puy-de-Dôme, France. The gunman, who set his house on fire, is later found dead. The gunman's partner was rescued.
A history teacher is stabbed and decapitated near a school in Conflans-Sainte-Honorine, Île-de-France, France. The killer is shot dead by police. The anti-terrorism prosecutor investigates the murder, which is described by President Emmanuel Macron as an "Islamist attack". The victim is believed to have shown caricatures of Islam's prophet Muhammad to his students during a lesson.
A fire inside Nantes Cathedral in Nantes, France, destroys the 400-year-old grand organ, which had survived two major fires in 1944 and 1972, and some stained glass windows. Police are treating the fire as arson, saying three fires appear to have been started deliberately.
Two men armed with knives take a priest, two nuns and two parishioners hostage in a church near Rouen in the French region of Normandy. French police kill the hostage-takers after the 86-year-old priest, Jacques Hamel, was killed by slitting his throat.
A senior French police commander is killed by a knife-wielding 25-year-old man outside his home in Magnanville near Paris, France. The attacker, who retreated inside the house, is also killed when elite police commandos storm the residence after negotiations failed. The commander's partner, a female administrative police official, is found dead inside the home, while a young boy is rescued physically unharmed. The Islamic State, via its Amaq News Agency, claims responsibility for the attack.
At least one person is killed after a group of armed men took people hostage in the northern French town of Roubaix near the Belgian border. The hostages are thought to be a bank director and his family. French police say the incident may be related to a robbery and not to the November 2015 attacks in Paris.