Pat Dollard | Young Americans

The attack is but a “warning to this infidel nation and whoever follows its example,” it said. Denmark “published the insulting drawings” and later “refused to apologize for publishing them, instead they repeated their act,” the posting said.

ISLAMABAD, Pakistan (AP) - Denmark shared a video of the suicide car bombing against its embassy in Islamabad with Pakistani investigators, as an Internet posting Thursday purportedly by al-Qaida claimed responsibility and threatened more attacks.

The statement said Monday’s attack was carried out to fulfill Osama bin Laden’s promise to exact revenge for the reprinting in Danish newspapers of a cartoon of Islam’s Prophet Muhammad wearing a bomb- shaped turban.

The attack killed six people, including one Danish citizen. It caused widespread destruction and demonstrated the vulnerability of the Pakistani capital to attack by Islamic extremists.

The authenticity of the statement, which was posted on a Web site frequently used by Islamic militants, could not be independently verified. It was signed by al-Qaida commander Mustafa Abu al-Yazeed and dated Tuesday.

It warned if Denmark fails to apologize for the cartoons, more attacks will follow and Monday’s blast will “only be the first drop of rain.”

The attack is but a “warning to this infidel nation and whoever follows its example,” it said. Denmark “published the insulting drawings” and later “refused to apologize for publishing them, instead they repeated their act,” the posting said.

It said the bombing was carried out by an al-Qaida martyr whose last will and testament will soon be made public, and thanked Pakistani jihadists for helping execute the plot.

Denmark officials already have said they suspect al-Qaida was behind the attack.

Pakistan Foreign Ministry spokesman Mohammed Sadiq would not comment directly on the claim of responsibility, but said it would not affect the country’s attempts to negotiate peace with militant groups in regions bordering Afghanistan.

Ben Venzke of IntelCenter, a U.S. group which monitors al-Qaida messages, said al-Qaida could target embassies and diplomatic personnel from other countries where the cartoons also were published. Venzke said Norway, the U.S. and all European Union member countries, including Denmark, were most at risk.

In early 2006, a dozen Muhammad cartoons, originally published in a Danish newspaper, triggered fiery protests in Muslim countries when they were reprinted by a range of Western media, mostly in Europe. The drawing of Muhammad in a bomb-shaped turban appeared again in Danish newspapers Feb. 13, after Danish police said they foiled an alleged plot to murder the cartoonist who drew it.

That has sparked more, mostly peaceful, protests by Muslims. Islamic law generally opposes any depiction of the prophet, even favorable, for fear it could lead to idolatry.

Monday’s attack was the deadliest strike against Denmark since the publication of the cartoons. A 10-member Danish crisis management team is in Pakistan to help probe the bombing and assess security for the Danish diplomatic mission in the capital.

Spokeswoman Louise Brincker said the Danes have shared a video from a closed-circuit camera with Pakistani investigators that shows the car arriving outside the embassy and exploding.

She said it is not possible to see the license plates because of the camera angle. Danish Foreign Minister Per Stig Moeller said Wednesday the video also doesn’t show who was in the car.

Mirza Mohammed Yasin, chief of Pakistan’s investigation team, said they were also following up leads from the crime scene and questioning several people but had made no arrests.

Pakistani investigators have said the car was stolen and equipped with fake diplomatic plates to help gain access to the street, which is not barred to the general public but has high security. The Danish Security and Intelligence Service said Wednesday that preliminary information about the car indicated “major and long-term planning.”

Pakistan’s upper house of Parliament has passed a motion urging all diplomatic missions to move to the heavily guarded diplomatic enclave in Islamabad. The Foreign Office said Thursday that the existing enclave is full, but that an extension is planned.

Al-Qaida is believed to have regrouped inside Pakistan’s lawless border regions since the U.S.-led invasion that ousted its Taliban hosts in Afghanistan in 2001.

Pakistan’s newly elected government is in peace talks with militants to try to curb Islamic extremist violence in its territory.

The U.S. is worried this will give militants greater freedom to attack Afghanistan and the West, but Pakistan insists it is only talking to militants willing to lay down their arms, not “terrorists.”