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A stabbing at a school in northern France has left one person dead and at least two others seriously injured.
French President Emmanuel Macron is heading to the scene of the suspected terror attack, in the city of Arras, 185 kilometres north of Paris.
According to BFMTV, the knife-wielding suspect cried "Allahu Akbar" during the attack at Gambetta's public high school, which they say took place around 11am local time (9pm AEDT) on Friday.
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Police confirmed a teacher was killed in the deadly attack, with BFMTV reporting the victim is a French language teacher at the school.
There are also reports a sports teacher at the school was stabbed and injured in the incident.
Police say the situation is now under control after local officials arrested the attacker, who is believed to be a former student from the school.
The attacker's brother has also been arrested in connection with the incident, BFMTV reports.
French anti-terror prosecutors have now taken over the investigation but the motive was not immediately clear.
Such school attacks are rare in France.
It came amid heightened tensions around the world over Hamas' weekend attack on southern Israel and Israel's military response, which have killed hundreds of civilians on both sides.
France's Interior Minister, Gerald Darmanin, had on Thursday ordered local authorities to ban all pro-Palestinian demonstrations amid a rise in antisemitic acts since the Hamas attack.
France is estimated to have the world's third-largest Jewish population after Israel and the US, and the largest Muslim population in Western Europe.
A vice president of the lower house of parliament, Naima Moutchou, said the National Assembly "expresses its solidarity and thoughts for the victims, their families and the educational community as we learn that a teacher has been killed and several others have been injured".
