About it to Agency has informed a source in law enforcement bodies.
Bar patrons and opera-goers described surprise and confusion, and being ordered to stay inside while the police operation was underway on rue Monsigny in the lively 2nd arrondissement, or district, of the French capital.
It is worth noting that the attack occurred near the main Opera house in an area where there are bars, restaurants, cinemas that are crowded with people on weekends.
The prosecutor's office on counterterrorism announced that it had launched an investigation into the attack.
What do we know about the attacker?
In a message on Twitter, Interior Minister Gerard Collomb praised the "cool and quick reaction of the police forces who neutralised the attacker".
The Islamic State group claimed responsibility, according to the SITE monitoring group, but provided no corroborating proof to back their assertion.
Since 2012, hundreds of people have died in a series of terrorist attacks across France featuring explosives, firearms and vehicular ramming.
A witness who was sitting in a Japanese restaurant with his girlfriend told Le Parisien: Just before 9pm, we saw people rushing inside the restaurant screaming that a man was outside with a bloody knife.
Prime Minister Edouard Philippe said it took police less than nine minutes to subdue the attacker from the moment they were alerted.
It is specified that two of the victims were hospitalized in critical condition. The statement also said the assailant acted in response to calls to attack anti-ISIS coalition countries. The woman was bleeding and the attacker appeared behind her. When police officers arrived minutes later, he threatened them and was shot to death, according to police union official Yvan Assioma.
The attack comes as France is under a constant threat from terrorism. A friend came to her aid and the attacker left, "hitting on all the doors, all the shops", the witness told BFM.
Anne Hidalgo, the mayor of Paris, said: Tonight our city was bruised.
It follows an Isis attack in south west France on March 23, which saw the number of terrorist victims killed on French soil since January 2015 rise to 245.