Europol coordinates the largest operation against audio terrorist propaganda, with over 1,100 hours of targeted content.

Europol has coordinated the largest operation to date for the identification and removal of audio terrorist propaganda, targeting over 17,000 links on 40 online platforms. The content, equivalent to 47 days of continuous listening, highlights a growing shift of extremism towards audio formats, which are more difficult to detect and moderate.

Europol has coordinated the largest action to date against terrorist propaganda distributed in audio format, targeting over 17,000 links on 40 online platforms and a volume of content exceeding 1,100 hours. The operation reflects a strategic shift by extremist groups, which are increasingly using audio content to avoid detection and facilitate online radicalization.

In short

Europol targeted 17,298 URLs with extremist propaganda on 40 online platforms. The analyzed content exceeds 1,100 hours, equivalent to 47 days of continuous listening. 77% of the reported content has been removed by the platforms. The operation involved authorities from 13 European countries and Serbia. Europol warns that extremist propaganda is increasingly shifting towards audio formats.

Europol coordinated a large-scale operational action targeting terrorist propaganda distributed through audio content, a type of material that is becoming more prevalent on online platforms. The operation, carried out as part of a "Referral Action Day," which is a coordinated action in which authorities identify and forward illegal content to platforms for removal according to their rules, led to the reporting of 17,298 links.

The identified materials include speeches by terrorist leaders, songs that glorify violence, and so-called "nashids," which are Islamic songs frequently used in jihadist propaganda. These forms of content are used as tools of psychological influence, intended to create emotional reactions, strengthen group identity, and promote extremist ideologies.

Investigators collected the content in the weeks prior to the action and conducted checks to avoid interference with ongoing investigations. Subsequently, the links were forwarded to online platforms for evaluation based on their own usage rules. To date, 77% of the identified content has been removed.

The operation was initiated and coordinated together with authorities from 13 European states, along with Serbia, and was supported by the EU Internet Referral Unit, Europol's specialized unit in combating extremist content online.

European authorities warn that extremist propaganda is increasingly shifting towards audio formats, as they are harder to detect than video or visual materials. Identifying radical messages requires linguistic expertise and contextual understanding, allowing these materials to circulate longer without being removed.

At the same time, audio content can serve as a more subtle entry point into extremist ecosystems. Unlike explicit ideological speeches, songs or audio materials may appear cultural or inspirational, facilitating broader public access to radical messages.

The importance of this type of propaganda is also highlighted by its use in concrete cases of radicalization. An expert from the EU Internet Referral Unit previously presented in court how such audio content contributed to the radicalization of a suspect convicted for preparing a terrorist attack in Stockholm in 2025.

By coordinating this action, Europol strengthens its role as a center of expertise in combating online terrorist propaganda, providing support to member states in identifying, analyzing, and removing extremist content.

This action is part of EMPACT, the European multidisciplinary platform for combating serious and organized crime, which coordinates operational cooperation between member states and European institutions. In this context, the EU Internet Referral Unit plays a central role in monitoring emerging trends and developing response tools.

The shift of propaganda towards audio formats reflects the adaptation of extremist groups to the moderation mechanisms of digital platforms. For European authorities, this phenomenon indicates the emergence of a new vulnerable area in the online ecosystem, where detection and intervention become more complex.