A man armed with a knife has died after being shot by police at Gare du Nord train station in Paris, according to reports.
The incident occurred at around 7am local time on Monday, with officers then setting up a security perimeter.
The suspect has not been formally identified.
Eurostar train services to London were immediately cancelled in the aftermath of the shooting.
A video posted to Twitter appears to capture several officers with guns drawn before shots are heard.
The camera pulls away as panicked commuters look on.
The suspect's knife allegedly bore the inscription "ACAB", an anti-police slogan standing for "All Cops Are Bastards", reports CNEWS.
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Transport Minister Jean-Baptiste Djebbari confirmed in an interview with RMC radio that the suspect had subsequently died.
"The person who attacked them died on the spot," he said, adding that two police officers had received minor injuries.
He dismissed any suggestion the incident was a terror attack and said the man was known to the police.
Interior Minister Gérald Darmanin earlier tweeted: "This morning around 7 a.m., a police patrol was threatened by an individual armed with a knife in public transport in the Ile-de-France region.
"The police used their weapon, thus removing any danger, for themselves and for the travellers."
The suspect is understood to have approached two police officers wielding a blade of around 30cm.
The attacker was initially reported to have suffered "very serious wounds".
"He was rushed to intensive care after being shot several times by a police patrol he had threatened," said a source close to the case.
"There were fears that we would hurt somebody at the station, and this was the reason he was shot."
Another investigating source said: "The wounded man was well known for hanging around the station, and may well have had psychological problems."
Gare du Nord is one of Europe's biggest train stations and home to international train services connecting to Britain and Belgium.
It's the main Eurostar hub in the French capital.
Eurostar train services to London were immediately cancelled following the fatal shooting.
Passengers were boarding a 7.10am service to London when police open fired, but it was not allowed to leave.
Instead, offices cordoned off the area leading up to Eurostar departures, while also preventing other trains from leaving.
Police on the streets of Paris have been threatened by numerous lone wolf knifemen, as well as gangs of terrorists, over the past seven years.
In October 2019, a radicalised computer operative working at the Paris Prefecture in central Paris stabbed four of his colleagues to death.
The attacker – who was also shot dead – turned out to be a fanatic who kept extremist Al-Qaeda and Islamic State literature and images on his computer.
