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.

Putin and Modi discuss trade, peace in New Delhi summit
Indian air travel crippled as IndiGo's pilot crisis enters fourth day
Lebanon says ceasefire talks aim primarily at halting Israel's hostilities
US to widen travel ban to more than 30 countries, Noem says
Putin visits Delhi as Russia, India seek to increase and diversify trade
