The bomb attack on the Danish embassy in Islamabad, Pakistan, was claimed by the al-Qaeda group in Afghanistan. The terrorist group acknowledged the attack though an internet posting, BBC reported.

The internet statement posted on a website used by Islamic militants underlined the fact that the attack was a vendetta for the reprinting of a "blasphemous" cartoon of the Prophet Mohammed in Danish newspapers in February.

The posting’s authenticity hasn’t been yet independently verified. The claim is attributed to Mustafa Abu al-Yazid, Al Qaeda’s leader in Afghanistan. The leaders said that if Denmark did not apologize for the cartoons, more attacks would follow. He also added that the will of the suicide bomber who carried out the attack would be published soon.

A team of investigators was sent by Denmark to look into the Islamabad attack. The footage of the embassy's surveillance cameras was handed over to Pakistani investigators.

The attack said that Monday’s attack was “revenge against the infidel government” of Denmark which made a big mistake by publishing “degrading drawings of the prophet.”

The publishing of the controversial cartoon, depicting Prophet Muhammad with a turban resembling a bomb, triggered protests in Muslim countries in the Middle East and Asia.

While justifying the attack, Mr. Yazid also referred to a speech by Osama bin Laden saying: “If there is no check on your freedom of words, then let your hearts be open to the freedom of our actions.”