France’s president has urged the nation to stay united as it hunts gunmen who killed 12 people at the office of a satirical newspaper.

A massive manhunt has been launched for three fugitive gunmen who carried out a deadly terror attack on a French satirical magazine, killing 12 people.

Twelve people have been shot dead in a terror attack at the offices of a French satirical weekly which angered some Muslims after publishing crude caricatures of Islam’s prophet Mohammed.

Officials say that the gunmen responsible for the shooting dead of 12 people at a French satirical newspaper are still at large in Paris.

France has stepped up security at its embassies across the Muslim world after a French satirical magazine published crude caricatures of Islam's Prophet Mohammed.

A French magazine ridiculed the Prophet Mohammed by portraying him naked in cartoons, threatening to fuel the anger of Muslims around the world who are already incensed by a film depiction of him as a womanising buffoon.