A knife-yielding man shouting ‘Allahu akbar’ (God is great) stabbed five Parisians, one of them fatally, before he was shot dead by police late on Saturday.
Prosecutors have launched a terror investigation.
The Islamic State group claimed the knife attacks which took place between the main opera house and the Louvre museum filled with bars, restaurants and theatres.
People were enjoying the weekend drinking and chatting merrily when, suddenly, shots were heard and diners were asked to come inside bars and restaurants for their own safety.
French President Emmanuel Macron said France once again paid the price of blood.
One of the five people attacked died of stab wounds while two others are in serious condition in a hospital.
Police tried to capture the attacker alive but their taser did not work and a cop shot him dead.
French far-right leader Marine Le Pen called for tougher security measures after Saturday’s attack.
The French people will no longer be content with talk, they expect action, she said.
France has suffered some major Islamist strikes since 2015. They include the mass shooting at the office of the satirical newspaper Charlie Hebdo in Paris, the November 2015 attacks that killed 130 in Paris, and the 2016 Bastille Day truck attack in Nice that killed more than 80.