Paris newspaper attacked

An image from video posted online shows masked gunmen just before one of them appears to shoot a Paris police officer at close range, following an attack on the office of weekly newspaper Charlie Hebdo, Jan. 7, 2015, in Paris, France.

Terror attack in Paris

Alleged attackers fire on police in Paris.

Twelve people were killed and 10 injured in shooting at the Paris offices of the satirical weekly Charlie Hebdo, already the target of a firebombing in 2011 after publishing cartoons deriding Prophet Mohammad on its cover.

Separately, the government said it was raising France's national security level to the highest degree.

Terror attack in Paris

Firefighters carry a victim on a stretcher at the scene after a shooting at the Paris offices of Charlie Hebdo, a satirical newspaper, Jan. 7, 2015.

Twelve people were killed and 10 injured in shooting at the Paris offices of the satirical weekly Charlie Hebdo, already the target of a firebombing in 2011 after publishing cartoons deriding Prophet Mohammad on its cover, police spokesman said. Five of the injured were in a critical condition, said the spokesman. Separately, the government said it was raising France's national security level to the highest notch.

Terror attack in Paris

Policemen work at the scene after a shooting at the Paris offices of Charlie Hebdo, a satirical newspaper, Jan. 7, 2015.

Terror attack in Paris

Armed gunmen face police officers near the offices of the French satirical newspaper Charlie Hebdo in Paris on Jan. 7, 2015.

Terror attack in Paris

A person reads the latest issue of the French satirical newspaper Charlie Hebdo in Paris on January 7, 2015, after gunmen armed with Kalashnikovs and a rocket-launcher opened fire in the offices of the weekly in Paris, killing at least 12.

Terror attack in Paris

French President Francois Hollande, center, arrives at the headquarters of the French satirical newspaper Charlie Hebdo in Paris after armed gunmen stormed the offices.

Terror attack in Paris

Firefighters carry an injured man on a stretcher in front of the offices of the French satirical newspaper Charlie Hebdo in Paris, Jan. 7, 2015, after armed gunmen stormed the offices leaving at least 10 people dead.

Terror attack in Paris

A police officer stands next to the bicycle of a police officer who was hit by a car near the shell of a bullet, bottom right,not far from the offices of the French satirical newspaper Charlie Hebdo in Paris on January 7, 2015, after armed gunmen stormed the offices leaving eleven dead, including two police officers, according to a source close to the investigation. AFP PHOTO / PHILIPPE DUPEYRAT (Photo credit should read Philippe Dupeyrat/AFP/Getty Images)

Terror attack in Paris

French police officers and forensic experts examine the car used by armed gunmen who stormed the Paris offices of satirical newspaper Charlie Hebdo, killing 12 people in Paris, Jan. 7, 2015.

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 a gunman had hijacked a car and knocked over a pedestrian while attempting to speed away.

Terror attack in Paris

 A survivor, front left, is talking on her mobile in front of the offices of the French satirical newspaper Charlie Hebdo in Paris, France, Jan. 7, 2015.

Armed gunmen stormed the offices leaving twelve dead, including two police officers, according to French officials.

Terror attack in Paris

A bullet's impact is seen on a window at the scene after a shooting at the Paris offices of Charlie Hebdo, a satirical newspaper, Jan. 7, 2015.

Terror attack in Paris

French police officers and forensic experts examine the car used by armed gunmen who stormed the Paris offices of satirical newspaper Charlie Hebdo in Paris, killing 12 people, on January 7, 2015.

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 a gunman had hijacked a car and knocked over a pedestrian while attempting to speed away.

Terror attack in Paris

A police car riddled with bullets during an attack on the offices of the newspaper Charlie Hebdo in Paris which left twelve dead.

Gunmen armed with Kalashnikovs and a rocket-launcher opened fire in the offices of French satirical weekly Charlie Hebdo on January 7.

Terror attack in Paris

Hassen Chalghoumi, left, Imam of the municipal Drancy mosque in Seine-Saint-Denis, walks with police near the Paris offices of Charlie Hebdo, a satirical newspaper, after a shooting January 7, 2015.

Terror attack in Paris

French cartoonist Charb, publishing director of French satirical weekly Charlie Hebdo, poses for photographs at their offices in Paris, Sept. 19, 2012.

Charlie Hebdo published cartoons of the Prophet Mohammad on Wednesday, a decision criticized by the French authorities which sent riot police to protect the magazine's offices.

Terror attack in Paris

French cartoonist Cabu arrives at a Paris court on February 8, 2007 when the French satirical weekly "Charlie Hebdo" was sued by two influential Islamic groups for inciting hatred against Muslims by printing caricatures of the Prophet Mohammad.

Terror attack in Paris

French cartoonist Wolinski displays a drawing which he made during a photocall for the film about French satirical weekly Charlie Hebdo, "C'est Dur d'Etre Aime par des Cons"at the 61st Cannes Film Festival, May 16, 2008.

Terror attack in Paris

Copies of the French satirical weekly "Charlie Hebdo" are seen in their Paris newsroom, Febr. 9, 2006.

The publication reprinted cartoons of the Prophet Mohammad in its February 8, 2006 edition and published one of its own on its front page, further angering Muslim groups which say the caricatures are blasphemous. [French Muslim organizations tried to prevent Charlie Hebdo reprinting the 12 cartoons, which were first published by the Danish paper Jyllands-Posten, but a court rejected their suit on a technicality.]

Terror attack in Paris

Jeannette Bougrab, former French Youth and Associations Junior Minister, wearing a medical card walks near the scene after a shooting at the Paris offices of Charlie Hebdo, Jan. 7, 2015.

Terror attack in Paris

A distressed woman is assisted by firemen near the scene after a shooting at the Paris offices of Charlie Hebdo, Jan. 7, 2015.