Several other attacks, including the shocking murder of a priest in his church in Normandy and a truck attack in Nice that killed 84.
It was one of nearly a dozen attacks and plots targeting the French security services since 2012, including the murder of a police officer and his wife by an Isis supporter north of Paris, a machete attack outside Le Louvre and an attempted murder at Orly airport.
A second suspect in the Paris attack on Thursday night has turned himself over to Belgian police after France was alerted about a potential accomplice.
Released on probation in 2015 from a further two-year jail term imposed for lesser offences, Cheurfi was arrested again in February after threatening to kill police officers - but released for lack of evidence.
Piecing together reports from witnesses, investigators said a gunman jumped out of a auto near a subway station and opened fire on a police vehicle with a machine gun.
Islamic State, which has hundreds of French-speaking fighters, claimed responsibility for the Champs Elysees shooting soon afterwards, in a statement identifying the attacker as "Abu Yousif al-Belgiki (the Belgian)". Speaking Friday on RTL radio, Macron said: "What our attackers want is death, symbolism, to sow panic (and) to disturb a democratic process, which is the presidential election".
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The speed of the claim and the fact the attacker was identified suggests he was in contact with the group and informed militants of his plan in advance.
French president Francois Hollande said he was convinced the circumstances of the attack pointed to a terrorist act.
April 21 (ANI): The attacker, who killed a police officer in Paris's Champs-Elysees area, was known for radical Islamist activities by the French security services.
Financial markets though shrugged off the latest twist in the presidential campaign with French bond yields hitting a three-month low on Friday.
Bloodshed had always been feared ahead of Sunday's first round of voting after a string of jihadist atrocities since 2015, and the shooting on the world-renowned boulevard forced security to the top of the agenda in the campaign. Macron said he canceled campaign stops out of a sense of "decency" and to allow police to concentrate resources on the investigation.
"Last night's attack on Paris could have a massive influence on the political front, not only in France but also in the United Kingdom which is also preparing to head to the polls", said Naeem Aslam, Chief Market Analyst at Think Markets.
And over a decade ago in 2003 he was jailed for 20 years after opening fire on two cops when he was caught in a stolen vehicle, "grievously hurting them", according to police sources.
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Parisian commuters and tourists are walking warily past police tape around the Champs-Elysees after an attack that some say may push voters to favor far-right presidential candidate Marine Le Pen.
The attack, which was claimed by Islamic State, overshadowed the last day of campaigning for Sunday's presidential election first round.
Police authorities called on the public to avoid the area.
Three of his relatives were detained in searches of his family home in Chelles, although police stressed the move was standard procedure for questioning.
In November 2015, he took to Twitter to blame France's strict control laws for an Islamic State terror attack at multiple sites in Paris and its suburbs that left 137 people dead.
German Chancellor Angela Merkel said her sympathy "goes out to the victims and their families", according to her spokesman Steffen Seibert.
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In January 2016, Robertson faced a misdemeanor battery charge after an incident at his school and entered a diversionary program . Michigan State freshman defensive end Auston Robertson was charged with third-degree sexual assault Friday morning.