Europol said it coordinated its largest-ever Referral Action Day targeting terrorist and extremist audio propaganda, referring 17,298 URLs across 40 online platforms for review. The operation was initiated and co-led by Hungary and Europol’s EU Internet Referral Unit (EU IRU), with investigators from 13 countries participating. The referred material amounted to more than 1,100 hours of content and included speeches by designated terrorist leaders, songs glorifying violence, and nashids commonly used in jihadist propaganda; Europol said 77% of the content had been removed so far.
The action reflects a broader shift of extremist messaging toward audio-sharing platforms, where moderation is more difficult than for video or image content because detection often requires linguistic and contextual expertise. Europol said the campaign targeted propaganda used by actors across the ideological spectrum, including jihadist and violent right-wing extremist networks, and that investigators conducted deconfliction checks before referrals to avoid disrupting ongoing investigations. The case is operationally relevant as it highlights how threat actors continue to exploit less-moderated media formats to sustain online radicalization and propaganda distribution.

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By 2026-03-18, Europol reported that 77% of the audio propaganda content referred during the 3 March action had been removed by online service providers. Europol described the operation as its largest referral action to date targeting terrorist and extremist audio material.
On 2026-03-03, Europol and Hungary co-led a large-scale Referral Action Day focused on jihadist and violent right-wing extremist audio propaganda across 40 online platforms. Investigators from 13 countries referred 17,298 URLs containing more than 1,100 hours of speeches, songs, chants, and nashids for service-provider review and removal.
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