He seized a gun inside a police commissariat and attacked a police trainee. A source close to the investigation told CNN he was the subject of a "Fiche S" surveillance file and was on the radar of the French domestic security service, DGSI.
French television networks reported that he was a 39-year-old French national known for previous violent crimes. The Islamic State (ISIS) group has claimed responsibility for the attack, and named the attacker as Abu Yusuf al-Beljiki.
PARIS (AP) - France began picking itself up Friday from another deadly shooting claimed by the Islamic State group, with President Francois Hollande convening the government's security council and his would-be successors in the presidential election campaign treading carefully before voting this weekend. Candidates cancelled or rescheduled final campaign events ahead of Sunday's first-round vote in the two-stage election. One attacker was killed and officials said they were looking for a potential second suspect.
Left-wing insurgent Jean-Luc Mélenchon warned against allowing panic to "interrupt democracy".
Fillon, Le Pen and independent centrist Emmanuel Macron canceled planned campaign events after the shooting.
One police officer was killed and two others were seriously injured Thursday when a gunman opened fire at a police patrol on the famous Champs-Elysees boulevard here, according to the Interior Ministry.
A man emerged from the vehicle and opened fire on the van with an "automatic weapon", killing one officer instantly, Brandet said. He tried to run away but was killed by return fire.
A cop was shot dead on the Champs-Elysees shopping street before a Kalashnikov-wielding murderer was himself killed.
Suspect arrested over bombing of Dortmund's team bus, had financial motive
Dortmund CEO Hans-Joachim Watzke and club president Reinhard Rauball both expressed their gratitude to investigators. Three explosions occurred as Thomas Tuchel's team made their way to Signal Iduna Park for the European encounter.
Australia's prime minister offered his country's prayers for the shot police officers and urged Australians in Europe to be on their guard.
President Francois Hollande called an emergency meeting on Thursday evening and said at a press conference that he was convinced the attack was a terrorist act. "He opened fire on a police auto with an automatic weapon, killing one of the police officers and trying to attack others while running", a police source told the agencies, asking not be named.
Officers searched the home of the dead attacker in a town east of Paris, a police source said. He was convicted in that attack and had a criminal record because of involvement in violent robberies. The shooting comes two days after the arrest of two men in southern Marseille with weapons and explosives who were suspected of preparing an attack to disrupt the campaign.
Poutou, a car-factory worker backed by anti-capitalist party NPA, says the roots of extremist attacks are neither in mosques nor migrant camps.
The people of France will not take much more of this. "It just never ends".
U.S. President Donald Trump said on Twitter that the shooting would influence the French election.
Meanwhile, Belgian Interior Minister Jan Jambon told state broadcaster VRT that Belgian police had become involved in the investigation but that the perpetrator was a French national.
France is in a state of emergency and at its highest possible level of "terror alert", with militant-inspired assaults killing more than 230 people in recent years. "Will have a big effect on presidential election!".