French Prime Minister Jean Castex said on Friday that four people were injured, including two seriously, in a knife attack that took place near the former office of satirical magazine Charlie Hebdo.
A security cordon was set up around the office, a police source also said.
French media BFM TV and Le Figaro said a suspect has been arrested on the steps of the Paris Bastille opera house.

Afghan Taliban says 400 killed in Pakistan air strike on Kabul hospital
Five countries warn against major Israeli ground offensive in Lebanon
Fire breaks out at Qatar's Industrial Area after missile interception
Kuwait arrests Hezbollah-linked cell in security crackdown
Drone attack hits hotel in Baghdad Green Zone
