High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Operation Coldstore (sometimes spelled Operation Cold Store) was a security operation launched in Singapore on 2 February 1963 in which at least 111 anti-government left-wing activists were arrested and detained, including key members of the opposition political party Barisan Sosialis. Others arrested included newspaper editors, trade unionists and university students. The operation, authorised by the Internal Security Council which comprised representatives from the British Colonial, Malaysian Federal and Singapore governments, was touted as an anti-Communist sting.