A suspect in the incident has been taken into custody.
One of the persons has been seriously injured in the attack.
Interior Minister Gérald Darmanin poste don X: "This morning at Gare de Lyon, an individual injured 3 people with a knife before being arrested. One person is seriously injured."
Ce matin à la Gare de Lyon, un individu a blessé 3 personnes à l’arme blanche avant d’être interpellé. Une personne est blessée gravement. Deux autres le sont plus légèrement. Elles ont été prises en charge par les services de secours. Merci à ceux qui ont maîtrisé l’auteur de…
— Gérald DARMANIN (@GDarmanin) February 3, 2024
"Two others are more lightly. They were taken care of by the emergency services," he said.
"Thank you to those who restrained the perpetrator of this unbearable act," the Minister said.
Paris has witnessed several knife attacks in recent months.
In December, a tourist was killed in a knife attack close to the Eiffel Tower.