A knife attack early on Saturday in the Gare de Lyon rail station in Paris left three people wounded, police said.
Police said they had arrested the suspected attacker.
Two of the victims suffered light wounds, while the third was more seriously hurt but was not in a life-threatening situation, police added.
The suspected assailant's motive was not immediately clear.

Putin and Modi discuss trade, peace in New Delhi summit
Indian air travel crippled as IndiGo's pilot crisis enters fourth day
Lebanon says ceasefire talks aim primarily at halting Israel's hostilities
US to widen travel ban to more than 30 countries, Noem says
Putin visits Delhi as Russia, India seek to increase and diversify trade
