CHAPELLE-SUR-ERDRE, France—A radicalized French ex-prisoner on a watch list of potential terrorist threats stabbed a policewoman inside her station in western France on Friday and died following a shoot-out with police, a government minister said. The victim was seriously wounded but expected to survive, Interior Minister Gerald Darmanin said. The assailant had been released from prison in March following an eight-year sentence for violent crime and was on a security services register for individuals who might pose a terrorism risk. “He was flagged in 2016 for a strict practice of Islam, for radicalization,” Darmanin told reporters after visiting the police station in Chapelle-sur-Erdre, near Nantes, where the attack occurred. The attack bore chilling echoes to the fatal stabbing of a female police administrative worker near Paris a month ago. Stephanie Monferme was killed in the doorway to her police station by a Tunisian national who had watched Islamic religious videos …