Ten people have been shot dead in an attack at the offices of a French satirical magazine in Paris, media reports say.
Police said several masked gunmen stormed the headquarters of the weekly Charlie Hebdo in Paris.
"At this stage" 10 people are dead, said the Paris prosecutor's office, without detailing how many had been injured.
Deputy Mayor of Paris Bruno Julliard earlier said "six people are seriously injured", including a policeman.
French President Francois Hollande was on his way to the scene of Wednesday's shooting and called an emergency cabinet meeting.
A source close to the investigation said two men "armed with a Kalashnikov and a rocket-launcher" stormed the building in central Paris and "fire was exchanged with security forces."
The source said gunmen had hijacked a car and knocked over a pedestrian as he sped away.
The satirical magazine gained notoriety in February 2006 when it reprinted cartoons of the Prophet Mohammed that had originally appeared in Danish daily Jyllands-Posten, causing fury across the Muslim world.
Its offices were fire-bombed in November 2011 when it published a cartoon of Mohammed and under the title "Charia Hebdo". No one was injured in that attack.
Despite being taken to court under anti-racism laws, the magazine continued to publish controversial cartoons of the Muslim prophet.