The Pakistan Taliban has claimed responsibility for the attack on UN office in Islamabad, local TV channel reported Tuesday.

Taliban spokesman Azam Tariq said it launched the deadly attack on the UN food agency's offices in Islamabad because international relief work was not in "the interest of Muslims," the private TV ARY News reported.

Pakistani security officials and rescue workers survey the site of a bomb blast in Islamabad October 5, 2009. [Xinhua/AFP]

Tariq said Tuesday his group targeted the World Food Program because the UN and foreign aid groups are "infidels."

Tariq said the Taliban would launch more attacks on Pakistani and United States targets.

At least five UN officials, a foreigner and two women among them, were killed and eight others injured on Monday when a suicide bomber dressed as a paramilitary soldier blew himself up after slipping through high security checkpoints at the main office of the World Food Program in Pakistan's capital city of Islamabad.