Pakistan President Pervez Musharraf has directed law enforcement agencies to launch a national crackdown against banned extremist organizations, targeting their weapons, finances and meeting places.

In a meeting of many top police officers from across the country on Friday, General Musharraf issued a stern directive. He demanded that all hate material, including pamphlets, books, CDs and videos be removed from all Pakistani public markets by December.

The president says the crackdown is intended to stop the "extremist minority" harming Pakistan's interests and tarnishing the image of Islam.

Pakistan's new campaign against extremism follows last week's suicide bombings in London. Three of the four bombers are alleged to be Pakistani Britons.