Authorities in France say that the machete-wielding man who was shot by a security guard at Paris's Louvre Museum is in critical, life-threatening condition.
In addition, U.S. President Donald Trump weighed in on the attack on his personal Twitter account early Friday.
The attacker was seriously wounded in the incident "whose terrorism nature leaves little doubt", according to Hollande. Two backpacks carried by the attacker were searched and found to contain no explosives, police added.
This was later confirmed by the Egyptian Ministry of the Interior in Cairo.
Bid officials, however, claim Paris has the experience to organize and protect major events, often citing soccer's European Championship past year as an example despite troubles caused by hooligans in Marseille and a deadly truck attack in Nice that killed 86 people four days after the tournament final.
The Louvre Museum's security protocol kicked in, with entrances locked down and visitors rushed into rooms without windows.
Staff returned to the shops in the mall by around 12:30 p.m. local time (6:30 a.m. ET) and roadblocks were cleared from the surrounding area.
France's Interior Ministry said that the man's identity or nationality were not immediately known.
More than 230 people have died in France in the past two years at the hands of attackers allied to the militant Islamist group Islamic State.
The huge former royal palace in the heart of the city is home to the Mona Lisa and other world-famous works of art but also a shopping complex and numerous exhibition spaces.
Police have cordoned off access to the museum, which is one of the biggest tourist attractions in Paris. There is a significant presence of soldiers in the French capital since the country is in an extended state of emergency until July 2017.
Soldiers patrolling the area around the museum are part of Operation Sentinelle, the massive security beef-up measure that followed terror attacks in 2015 and 2016. She said that "there is not a single one escaping that menace".
TRT World spoke to Peter Humi in Paris for the latest.