"Operation Lalang (Operasi Lalang, also referred to as Ops Lalang and taken to mean Weeding Operation) was a major crackdown carried out beginning 27 October 1987 by the Malaysian police, ostensibly to prevent the occurrence of racial riots in Malaysia. The operation saw the arrest of 106 persons \u2013NGO activists, opposition politicians, intellectuals, students, artists, scientists and others\u2013who were detained without trial under the Internal Security Act (ISA)."@en .