A French police source told AFP that the attack was deliberate.
A man fell "deliberately" with his auto driving on students in the city of Blanquac, on the outskirts of Toulouse, southwestern France.
A auto has been driven into three students near the French city of Toulouse, leaving a woman in a serious condition.
Officials confirmed the 28-year-old suspect was not on the terrorism watch list, but had been planning the attack for quite some time.
A 23-year-old woman was the most seriously injured following the incident outside a college.
The driver attempted to drive off but was stopped by police and arrested straight away. They were all transported to the hospital. "We offer them and their families all of our support".
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The woman's life is not in danger, police said. He was known to the police but not to terrorist affairs.
Paul, a communications student at the IGS campus told local media: "I was in class and I heard sirens".
Toulouse prosecutor Pierre-Yves Couilleau said: "The individual was known to the police and the judiciary for several offences".
France has experienced a rash of vehicular terror attacks inspired by the Islamic State group, but there has been no immediate confirmation of the driver's identity or motive.
The vehicle ramming was reportedly a deliberate action.