Two women were killed at Marseille's Saint Charles train station by a man wielding a knife and crying "Allah Akabar".
As you can see, the scene was a bloodbath. with people panicking and authorities drawing their weapons.
The attacker was shot dead by soldiers of the Sentinelle anti-terrorist force, Efe news agency reported.
A total of 239 people, excluding the two victims of the Sunday attack in Marseille, have been killed in attacks in France since January 2015.
Anti-terror officials say they are now investigating any links the man might have had to terrorist organizations.
"An odious attack", tweeted French Interior Minister Gérard Collomb.
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Police in the southern coastal city said they had "neutralized" the assailant and cordoned off the area.
"I think the security services responded extremely quickly". It happened very quickly, after they secured the perimeter.
The SNCF railway operator urged people to avoid all travel to the transport hub.
The train station has been evacuated.
French television station BFM announced that the terrorist had been eliminated. One source said he was known to police for common law crimes, while another said digital analysis of fingerprints had come up with several aliases.
Security forces have increasingly been targeted by militants in knife attacks.