French authorities have identified the third suspect that attacked the Bataclan concert hall during the Paris terror attacks on Nov. 13.

The French newspaper Le Parisien reported Wednesday that the attacker was 23-year-old Foued Mohamed-Aggad of Strasbourg, France.

According to Reuters, investigators were able to identify the assailant after his mother confirmed that she received a text message from the Islamic State in Syria 10 days ago.

"The SMS message told her that her son had died, saying: 'He died on November 13 with his brothers,'" said the family's lawyer, Francoise Cotta. She said the mother was "instantly struck by the horrific thought" that her son was one of the Paris terrorists.

All three of the Bataclan attackers died after the incident, two by suicide vest detonation and one by gunfire from French police. Authorities were able to identify Mohamed-Aggad's body by matching his DNA to his mother's.

According to the Associated Press, Mohamed-Aggad left France for Syria with a dozen other young men in 2013, including his older brother Karim.

His brother and others eventually returned to France, disillusioned and disgusted by what they witnessed. They are currently facing charges for terror-related offenses.

Mourad Fares, a French national believed to have recruited them, is also under arrest.

Authorities are currently trying to find out how Mohamed-Aggad was able to renter the country undetected.

The Bataclan concert hall was one of several sites targeted during the Paris attacks that left 130 people dead. The other two attackers at the hall have been identified as 28-year-old Samy Amimour of Drancy, northeast of Paris, and 29-year-old Ismail Omar Mostefai of Chartres, southwest of the city.

All of the identified assailants in the attack were French and Belgian nationals.

French Prime Minister Manuel Valls said it was important that the investigation was progressing.

"This will all take time and in the face of the terrorist threat that is unfortunately here, we need to carry on with this work of tracking down terrorists because we are at war with radical Islam, with Daesh," he said, referring to the ISIS terror group.