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Paris police attack: 'Four killed' by knife-wielding man

A knife-wielding man has killed four officers at central police headquarters in Paris, French media report.The attacker, who has not been named but is said to be a member of staff, was later shot dead by police.There has been no official statement so far. The area in the île de la Cité - in the centre of Paris - has been sealed off. The attack comes a day after police went on strike across France over increasing violence towards officers.It happened at about 13:00 local time (11:00 GMT; 12:00 BST) in the courtyard of the building.French Prime Minister Edouard Philippe and Interior Minister Christophe Castaner are both at the scene. Paris mayor Anne Hidalgo confirmed on Twitter that "several people" had been killed in the attack, ...