According to the publication, a house is being searched in the house of the attacker.
Investigators do not rule out a version of personal conflict, the newspaper writes.
Earlier it was reported that a man attacked with police a knife in the prefecture of the Paris police on the island of Cité. The attacker was eliminated.
As a result of what happened, according to recent reports, four people were killed. French President Emmanuel Macron arrived at the scene of the tragedy.