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Internal Security Department

Report a threat

Learn how to report suspicious activities related to radicalisation, terrorism, communal extremism, or foreign interference to the Internal Security Department, and play an active role in safeguarding Singapore's security.

Last updated 6 March 2026
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Be vigilant and report suspicious activities

The terrorism threat has shown that security agencies alone cannot detect every radicalised individual in Singapore. The community plays an important role. Family, friends and colleagues are best placed to notice changes in an individual.

The time between radicalisation and commission of violence can be very short in some cases. Early reporting allows the authorities to investigate and intervene early to stem the radicalisation, before the individual harms or kills someone. Reporting to the authorities can save these individuals from themselves.

What are the signs of radicalisation?

Possible tell-tale signs of radicalisation include, but are not limited to:

  • Displaying signs or symbols of extremist/terrorist groups (e.g. displaying ISIS flag as one's social media photo).

  • Posting/sharing extremist views on social media platforms like expressing support/admiration for terrorists/terrorists groups as well as the use of violence.

  • Frequently surfing radical websites.

  • Sharing extremist views with friends and relatives.

  • Inciting others to participate in acts of violence.

  • Making remarks that promote ill-will or hatred towards people of other races, religions or communities.

  • Expressing intent to participate in acts of violence overseas or in Singapore.

If you have any information on any threat to Singapore’s security, such as a suspected case of radicalisation, terrorism, communal extremism or foreign interference, please contact ISD at 1800-2626-473 (1800-2626-ISD) or isd@mha.gov.sg.

You can also contact the Singapore Police Force at 999, if it is an emergency.

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