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 reopens Gaza's Rafah border crossing to Egypt, with limits
US envoy Witkoff to visit Israel, meet Netanyahu, Israeli officials say
Russian drone strike kills 12 miners in Ukraine
Singapore to launch space agency in response to global investment surge
Five-year-old boy returns to Minnesota after ICE release
Reopening of Gaza's Rafah crossing expected Monday
Winter storm death toll in United States reaches 90
Pakistan says 145 militants killed after attacks in Balochistan
