The Internal Security Act 1960 (ISA) is a preventive detention

Preventive detention

Preventive detention is an imprisonment that is not imposed as the punishment for a crime, but in order to prevent a person from committing a crime, if that person is deemed likely to commit a crime....

 law in force in Malaysia. The legislation was enacted after Malaysia gained independence from Britain in 1957. The ISA allows for detention without trial or criminal charges under limited, legally defined circumstances. On 15 September 2011, the Prime Minister of Malaysia, Najib Razak said that this legislation will be repealed and replaced by two new laws.