2024 Eskisehir Mosque Stabbing

On August 12, 2024, at approximately 18:22 local time, Arda Küçükyetim (approximately 18) approached Tepebaşı Mosque in Eskisehir, Turkey wearing a tactical vest, helmet, and glasses bearing the Black Sun symbol, and stabbed five worshippers. All five survived their wounds. He livestreamed the attack via a body-mounted camera on the platform Kick. Prior to the attack he had created a Telegram group through which a contact distributed his manifesto, photographs, and supporting documents. The manifesto cited Terrorgram Collective-associated "saints" by name, including Brenton Tarrant, Anders Breivik, Timothy McVeigh, and Stephen Paddock. The attack was confirmed as Terrorgram-inspired in two separate criminal sentencing proceedings: the U.S. sentencing of Dallas Humber on December 19, 2025, and the Canadian agreed statement of facts for Matthew Althorpe on March 27, 2026. Turkish courts sentenced Küçükyetim to 75 years and 5 months on September 24, 2025.¹

The Attack

Küçükyetim arrived at Tepebaşı Mosque in Eskisehir on the evening of August 12, 2024 and began attacking worshippers outside the mosque's entrance. The five victims were Tevfik Arslan (73), Cumali Özemek (57), Naşit Özyürek (89), Metin Korkmaz (66), and Cemal Altıntaş (53). All survived their stab wounds, though several required hospitalization. Turkish police apprehended Küçükyetim at or near the scene.

The Kick livestream was active during the attack and was shared through the Telegram group Küçükyetim had established beforehand. The stream link was also posted in a Terrorgram Collective group chat, placing the attack's documentation directly within Terrorgram's distribution infrastructure.²

Manifesto and Ideology

Küçükyetim's manifesto adopted accelerationist framing and the Terrorgram saints framework precisely, using the word "saint" to describe Tarrant, Breivik, McVeigh, and Paddock as inspirational models. It argued: "This system will eventually collapse... My actions and yours will accelerate this collapse and sooner or later the country, and then the world, will be covered in anarchy." The manifesto package also contained James Mason's Siege, Ted Kaczynski's manifesto, and Atomwaffen Division logos.

The package included the "Haters Handbook," a Maniac Murder Cult (MKY) propaganda document. Researchers noted Küçükyetim drew from multiple overlapping accelerationist content ecosystems, but he is not documented as a formal MKY member. His confirmed network attribution, established through U.S. and Canadian criminal proceedings, is Terrorgram.²

Natalie Rupnow, who carried out the December 2024 Abundant Life Christian School shooting in Madison, Wisconsin, had browsed Küçükyetim's Telegram chat prior to her own attack.

International Proceedings and Terrorgram Attribution

On September 5, 2024, 24 days after the Eskisehir attack, FBI agents arrested Humber and Matthew Robert Allison in California in a coordinated operation connected to the broader Terrorgram investigation. Turkish media reported at the time that investigators were connecting the U.S. arrests to the Küçükyetim case.

In the Humber sentencing in the Eastern District of California on December 19, 2025, DOJ prosecutors cited Küçükyetim's attack as one of several inspired or guided by Terrorgram's operational infrastructure under Humber's leadership. In Althorpe's agreed statement of facts before Ontario Superior Court on March 27, 2026, Canadian prosecutors documented that his publications had inspired "the stabbing of five people at a mosque in Turkey in 2024."¹

Turkish Sentencing

On September 24, 2025, a Turkish court sentenced Küçükyetim to 75 years and 5 months, comprising four 15-year sentences for attempted murder, one sentence of 11 years and 8 months, and 3 years and 9 months for creating public panic.³