Operation Coldstore

Operation Coldstore was the code name for a covert security operation executed in Singapore on 2 February 1963 which led to the arrest of 113 people, who were detained without trial pursuant to the Preservation of Public Service Security Ordinance (PSSO). In official accounts, the operation was a security operation "aimed at crippling the Communist open front organisation," which threatened Singapore's internal security. The operation was authorised by the Internal Security Council which was composed of representatives from the British government, Singaporean government, and the Malayan Federal government.