A note expressing support for Isis has reportedly been found near the body of a gunman who shot a police officer dead in the centre of Paris.
A source within the investigation told AFP of the discovery as a probe continued into the chief suspect, a 39-year-old Frenchman who was the subject of a previous terror investigation.
Isis swiftly claimed responsibility for the attack, giving the perpetrator a war name indicating he had links in Belgium and hailing him as a “fighter of the Islamic State”.
The group has issued detailed instructions on carrying out car and shooting attacks in its propaganda magazines, which urged followers to leave letters or other proof of their support to be found by authorities.
Gunman attack on the Champs-Elysees
“Lest the operation be mistaken for one of the many random acts of violence that plague the West, it is essential to leave some kind of evidence or insignia identifying the motive and allegiance to the caliphate, even if it is something as simple as a note,” said an article calling for knife attacks in October.