A knife-wielding man has killed four staff at police headquarters in Paris.
According to the BBC, the attacker, who has not been named but is also said to be an employee there, was later shot dead by police.
There has been no official statement so far. Witnesses described people running everywhere, many in tears.
The attack comes a day after police went on strike across France over increasing violence towards officers.
The attacker is said to have gone into the building and straight to his office where he began attacking colleagues with a knife.