A police report has been lodged against a protest on Saturday (June 3) on an MRT train, and the police have confirmed that they are looking into the matter.
The demonstration was staged against detentions that had happened 30 years ago under the Internal Security Act.
In May 1987, 22 people were arrested in Operation Spectrum and were accused of being involved in a Marxist conspiracy to establish a communist state.
Following last month’s launch of a book by ex-detainees to mark the anniversary of their arrests, activists held a silent protest on the North-South Line by wearing blindfolds and holding up the book “1987: Singapore’s Marxist Conspiracy 30 years on”.
Social activist Jolovan Wham shared photos of the protest on his Facebook page, which have since been circulated online.
The police said: “Anyone with information can submit it online at www.police.gov.sg/iwitness. All information will be kept strictly confidential.”