It said she is facing potential charges of making death threats, of defending terrorism and of intimidating behaviour directed at police.
The woman was dressed in a long robe, known as an abaya, the prosecutor’s office said.
Another police probe was opened into the shooting. That is automatic when officers use firearms.
Paris police said officers responded after train passengers reported that a woman was making threats. Government spokesman Olivier Veran said the woman “made remarks of a rather Islamist nature” that worried other passengers.
Phrases she reportedly used included “You’re all going to get it,” “Allahu akbar” and “Boom,” said Paris police chief Laurent Nunez.
Allahu akbar is “God is great” in Arabic.
Officers stopped the woman at a Metro and suburban train station in eastern Paris that serves the François Mitterrand national library.
The train station was evacuated. A search of the woman found that she wasn’t carrying explosives, the police chief said.
Police were verifying the identity of the woman who wasn’t carrying ID papers, but she is thought to have been arrested previously for threatening behaviour in 2021 and then hospitalised for apparent mental health problems, he said.
France has stepped up security since the October 13 school attack in the northern French town of Arras. French-language teacher Dominique Bernard was stabbed to death and three other people were wounded.
The alleged attacker in that case had been under police surveillance on suspicion of Islamic radicalisation. French anti-terror investigators said the suspect declared allegiance to the Islamic State group before the assault.
- AP