BREAKING: Paris attacker shot dead by police after stabbing a teacher to death
According to French media, a man was decapitated on a street in the Conflans St Honorine area at about 5pm local time.
The country's anti-terror prosecutor has called the incident a stabbing but the Reuters and AP news agencies reported the victim was decapitated, according to police sources.
A second police source told Reuters that witnesses heard the attacker shout Allahu Akbar, or God is greatest.
A terrorism investigation is underway, AP reported.
A teen suspect was shot dead by police after a teacher was beheaded in France. Nine more suspects were detained by police, including some of the teen's family members.
»» #France's Interior minister Gerald Darmanin said Monday that #police operations are underway into dozens of people who allegedly issued messages of support for the attacker after the beheading of a history #teacher near Paris. Samuel #Paty was beheaded in Conflans-Sainte-Honorine, northwest of Paris, by a 18-year-old Moscow-born Chechen refugee, who was later shot dead by police. Police officials said Paty had discussed caricatures of Islam's Prophet Muhammad with his class, leading to threats. Tributes have been paid to police officer Sergeant Matiu Ratana, who was shot dead in a custody centre in Croydon, in South London.
A 23 year old suspect, who subsequently turned the weapon on himself, is in a critical condition in hospital.
The police watchdog said the suspect was in a custody suite with his hands cuffed behind his back when he opened fire.
The Metropolitan Police Commissioner, Dame Cressida Dick, said the force is "mourning the great loss" of a "much loved colleague" who was "big in stature and big in heart."
Originally from New Zealand, Sergeant Rartna, who was known as Matt, had served with the Met for almost 30 years.
Clive Myrie presents BBC News at Ten reporting by home affairs correspondent Daniel Sandford in Croydon. Walter Wallace Jr., 27, was armed with a knife and shot by police Monday which prompted hundreds to take to the streets in outrage.