The man was shot by police after the horrific attack in Trappes © Twitter The man was shot by police after the horrific attack in Trappes Two people have been killed and at least one seriously injured after a man attacked 'several' passers-by in a Paris suburb.
The attacker, believed to have been carrying several knives, was shot by police in Trappes after making threats against officers.
At least two of the victims are members of the man's family, according to reports.
ISIS has claimed responsibilty for the bloodbath, describing the killer as an "Islamic state fighter".
The attack happened in the Paris suburb of Trappes The attack happened in the Paris suburb of Trappes
Police sources told Le Parisien that the man, in his 30s, was inside a house shouting: "Allahu akbar, if you enter I smoke you all." Allahu akbar means 'God is the greatest' in Arabic.
French TV network BFMTV reports that police opened fire on the man at around 10.20am local time.
There are contrasting reports on the knifeman's condition, with France 3 reporting that he died.
The network also reports he was known to intelligence services.
"The incident took place soon after 10am," said a French security source. "A man attacked passers-by in rue Camille Claudel in Trappes.
"He disappeared into a house when police arrived at the scene, and when he came out he was shot."
The knifeman was known for ‘apologising’ for terrorism, according to the same security source in Paris.
"Since 2016 he has been noted for his support for terrorist acts, but this does not mean that today’s attack was motivated by terrorism. An enquiry has started."
Armed police descended on Rue Camille Claudel in Trappes © Stock Picture Armed police descended on Rue Camille Claudel in Trappes
The man, who lived in the run-down town of Trappes, was in his 30s and armed with ‘several knives’. 
Armed police have descended on Rue Camille-Claudel, and people have been told to avoid the area.
Interior minister Gerard Collomb tweeted that the attacker had been neutralised, without saying if he was dead.
Mr Collomb said his thoughts were with "the victims and their loved ones", without saying how many victims there were.
Police and Interior Ministry officials said the attack claimed at least one victim.
Police have yet to comment on the knifeman's motives, and have yet to rule out a family dispute, France 2 reports.
It follows a series of knife and gun attacks carried out by Islamic State and al-Qaeda operatives in France, dating back to early 2015. France remains on a state of high terrorist alert, with police and army patrols patrolling the streets of major cities such as Paris.