The ISA (Internal Security Act) is one of the most controversial laws in the country where it is used against anyone threatening national security. As it is commonly used to arrest terrorists or those suspected to be linked to one, politicians have also been arrested for uttering seditious statements in public which could cause public unrest.
Since 2001, it was reported that 170 terrorists have been arrested under the Act. Most ot hem are members of known terrorists groups that include Al-Qaeda which is responsible for the New York 9/11 attack. Others are members of groups that include the Darul Islam, Abu Sayyaf, Liberation Tigers of Tamil Eelam, Jemaah Islamiyah as well as their own splinter groups. Foreigners who were arrested have since been deported and handed over to their respective authorities of the countries. Locals arrested have been rehabilitated and then they are released.
There are also a large group of JI (Jemaah Islamiah) members who have all been released with only 5 left in the Kamunting prison. The five are Mohammad Fazdullah Abdul Razak who is known to be the head of the Tandzim Al-Qaeda of South East Asia, Mustawan Ahbad, Faizal Ahmad Helme, Faizal Sulaiman Bokhari and Razali Kassan.