A policeman was shot dead on the Champs Elysees in Paris on Thursday night by a gunman who was under preliminary investigation for terrorism but "let go" in an attack claimed by the Islamic State of Iraq and the Levant.
Isil claimed the shooting, days before French presidential elections, via its Amaq news agency, naming the attacker as Abu Yousif al-Bajiki (the Belgian), but police said the identity had not been confirmed.
President Francois Hollande said he was convinced it was a terrorist attack.
Hollande: motive 'likely to be terrorism'
The gunman jumped out of a car around 9pm local time and opened fire on a police car parked on the Champs-Élysées, hitting at least two officers. The man’s gun, thought to have been a Kalashnikov, was described by authorities as a "war weapon".
The man was then shot dead as he fled and police later carried out searches at an address east of Paris, Pierre-Henry Brandet, the interior ministry spokesman, confirmed.
Police have searched a home of Karim Cheurfi in a suburb east of Paris. He is believed to be linked to the attack on police on the Champs-Elysees
The gunman had recently been detained for questioning in a police station in Meaux, outside Paris, after "informants" had indicated that he was "seeking to obtain weapons to kill policemen", according to reports.
But due to a lack of evidence, anti-terror prosecutors "let him go".
Le Parisien reported that authorities know the suspect as Karim C. The prosecutor has declined to name him, although he confirmed they did know his identity.
A police van is towed away from the Champs-Elysees following the shooting
A police document obtained by The Associated Press identifies the address searched in the town of Chelles as the family home of Karim Cheurfi, a 39-year-old with a police record.
Two police officials told The AP that the chief suspect is a 39-year-old from an eastern Paris suburb.
Police tape surrounded the quiet, middle-class neighborhood in Chelles early on Friday, and worried neighbors expressed surprise at the searches.
Police officer shot dead in central Paris
Archive reports by French newspaper Le Parisien say that Cheurfi was convicted of attacking a police officer in 2001.
The 39-year old gunman, was known by intelligence services for radicalisation and had previously targeted police 16 years ago in a car chase, when he opened fire on officers, according to BFMTV.
According to reports, during questioning in a police station, he managed to get hold of a police weapon and fire five times. The policeman survived, but the man was sentenced to several years in prison for the attack.
Video allegedly shows moment just after Champs Elysees shooting
Mr Brandet said police had a name for the gunman and it matched a suspect known to security services but the attacker’s fingerprints had not been matched with those of the suspect.
French prosecutors said they had opened a counterterrorism investigation, while a French interior ministry spokesman said there may be more than one attacker and the police had been “deliberately targeted”.
According to BFM TV, the attacker had boasted of wanting to kill police on the Telegram messaging service.
Mr Brandet said while witnesses have described only one gunman, the possibility of accomplices can’t be ruled out.
Paris shooting: Terror on Champs Elysees – in pictures