A Jewish woman was stabbed twice in the stomach at her home in Lyon, with police finding a swastika on the door after the attack.
The woman, believed to be in her 30s, reportedly suffered mild injuries during the attack after opening her door when the doorbell rang.
The male attacker fled the scene wearing all black and with his face hidden, and was still on the run on Saturday.
Stéphane Drai, the woman’s lawyer, said on BFMTV: “The victim, her family and the Jewish community are shocked… When we opened the door, we did not know that we could be the victim of an anti-Semitic attack, which could amount to an attempted murder.”
A complaint is expected to be filed for attempted homicide.
Grégory Doucet, the mayor of Lyon, tweeted his disgust at the attack, writing: “Such a surge of violence is unspeakable. All my support to the victim, to his loved ones.”
French prosecutors also opened a probe on Wednesday over a video showing anti-Semitic chants by a group of youths. There have been over 850 anti-Semitic acts in France since the Hamas attack.