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STORY: The suspect had been sentenced to four years in prison in 2016 for planning another attack and was on the French security services' watch list, and was also known for having psychiatric disorders, the interior minister told reporters.

The attack took place around 1900 GMT when the man attacked a tourist couple with a knife on the Quai de Grenelle, a few feet away from the Eiffel Tower, fatally wounding a man. He was then chased by police and attacked two other people with a hammer before being arrested.

The suspect had shouted out "Allahu Akbar" (God is greatest) and told police he was upset because "so many Muslims are dying in Afghanistan and in Palestine" and was also upset about the Gaza situation, Darmanin said.

The anti-terrorism prosecutor's office said it was in charge of the investigation.