A 55-year-old merchant was killed in Largentiere, Ardèche after he chased an individual suspected of a street robbery and tried to intervene, prosecutors said. The attack happened on a public street in the town on Friday, early afternoon. The merchant died from stab wounds, according to the prosecutor in charge of the case, after a person allegedly inflicted injuries with a knife. Police said a robbery with violence, described as a “grab robbery,” had taken place. The merchant then pursued the suspect, and the situation escalated into a fatal stabbing. One person has been placed in police custody. The prosecutor said the case involves “stabbing with a knife” injuries, pending confirmation after medico-legal examinations. Officers are investigating the incident as intentional homicide, and the case file has been assigned to the criminal division in Avignon. Police are still working to determine exactly what happened during the chase and intervention.