Four people have been killed in a knife attack at the police headquarters in Paris.
Three of the people killed were police officers while one was an administrative worker.
The knife attack happened at around 1pm local time.
Police say the man behind it, was a 45-year-old man who'd worked there for 20 years.
He was shot dead at the scene.
Local media say he'd recently converted to Islam - the motive isn't yet known.