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.

Israel and Lebanon agree to implementation of ceasefire
Delhi to crack down on fire safety violations after blaze that killed 21
Kuwait cuts Iran embassy staff, declares two diplomats 'persona non grata'
All EU members greenlight first step in accession talks, Ukraine PM says
North Korea's Kim calls for 'exponential' nuclear expansion
