Terrorists kill 12 at newspaper behind Muhammad cartoons
Three masked gunmen stormed the offices of the controversial publication, which has previously been attacked over its portrayal of the Prophet Mohammed.
They were armed with Kalashnikov rifles and are also believed to have had a rocket-propelled grenade.
According to the AFP news agency, the attackers shouted: "We have avenged the prophet."
They are believed to have called out the victims by name.