The attacker was heard shouting "Allahu akbar" - Arabic for "God is great" - prior to the stabbing.
France has been targeted in a string of Islamist attacks since January 2015, most of which have been claimed by ISIS or carried out in its name.
Azimov became a French citizen in 2010 after his mother was naturalized, government spokesman Benjamin Griveaux told French television.
He said: "Even though smaller-scale terrorist attacks are becoming more and more common, larger-scale attacks like the one against the Bataclan could happen again". A French judicial source confirmed with ABC News that the alleged assailant was on the country's database of radicalized people.
Prosecutor François Molins said the attack was being treated as terrorism.
U.S. President Donald Trump makes a statement about Syria at the White House in Washington, U.S., April 13, 2018.
Islamic State claimed responsibility for the attack, but provided no proof. Habib, a former vice president of the CRIF umbrella group of French Jewish communities, expressed his condolences to the surviving victims and their families and expressed his appreciation for police's rapid response. "Acts like this only strengthen the resolve of the global coalition to defeat ISIS and drive it out of existence", Sanders said.
Trump tweeted about the attack for the first time Sunday evening, saying, "So sad to see the Terror Attack in Paris".
"This kind of sickness & hatred is not compatible with a loving, peaceful, & successful country!" In June, police officers were assaulted by another Muslim extremist wielding a hammer near the Notre-Dame cathedral in Paris.
The Paris attacker has been on a French national security watch list, fiche S, since 2016 - which did nothing to prevent him from going on a stabbing rampage on Saturday night.
NPR's Eleanor Beardsley reports that the assailant was shot dead by police. "The police intervened immediately and the individual died", he said.
Foreign Minister of France Jean-Yves Le Drian called unacceptable the position of the head of Chechnya, Ramzan Kadyrov, who gave the government of this country responsible for the attack may 12 ethnic Chechen Hassan Asimov.
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