PARIS, Jan 7 � Heavily armed gunmen shouting Islamist slogans stormed a Paris satirical newspaper office today and shot dead at least 12 people in the deadliest attack in France in four decades, report agencies.
Police launched a massive manhunt for the masked attackers who reportedly hijacked a car and sped off, running over a pedestrian and shooting at officers.
Police said witnesses heard the attackers, who were armed with a Kalashnikov and rocket launcher, shout, �We have avenged the Prophet� and �Allahu Akbar� (God is the greatest).
Two policemen were confirmed among the dead and four people were critically injured. The capital was placed under the highest alert status after the attack on Charlie Hebdo, a satirical weekly, that has sparked anger in the past among Muslims for publishing cartoons of Prophet Mohamed.
Editor-in-chief Stephane Charbonnier, known as Charb, and the cartoonists known as Cabu, Tignous and Wolinski were killed in the attack on the paper, a judicial source said.
Television footage showed large numbers of policemen in the area, bullet-riddled windows and people being carried away on stretchers.
The attack took place at a time of heightened fears in France and other European capitals over the fallout from the wars in Iraq and Syria where hundreds of European citizens have gone to fight alongside the radical Islamic State group.
President Francois Hollande, who immediately rushed to the scene of the shooting, described it as a barbaric terrorist attack.
�An act of exceptional barbarism has just been committed here in Paris against a newspaper, meaning (against) the expression of liberty,� Hollande said at the scene.
One man, who witnessed the shooting, said he saw two attackers shooting their way out of Charlie Hebdo around 11:30 am (10:30 GMT).
�I saw them leaving and shooting. They were wearing masks. These guys were serious,� said the man who declined to give his name.
�At first I thought it was special forces chasing drug traffickers or something. We weren�t expecting this. You would think we were in a movie.�
Hollande called for �national unity,� adding that �several terrorist attacks had been foiled in recent weeks.�
The White House condemned the attack in the �strongest possible terms,� while British Prime Minister David Cameron called it �sickening.�
Today�s shooting is one of the worst attacks in France in decades.
In 1995, a bomb in a commuter train attributed to Algerian extremists exploded at the Saint Michel Metro Station in Paris, killing eight and wounding 119.
The satirical newspaper gained notoriety in February, 2006 when it reprinted cartoons of the Prophet 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 the Prophet which is against the tenants of Islam.
Despite being taken to court under anti-racism laws, the weekly continued to publish controversial cartoons of the Prophet.