Sergei Yatskov
Sergei Yatskov, born 1980. Charges: Article 205.3, Russian Criminal Code (Receiving training for the commission of terrorist crimes); Article 205.5 part 2, Russian Criminal Code (Participation in the activities of a terrorist organization); “Sergei Yatskov's case on participation in the activities of a terrorist organisation”. Sentence (August 22, 2025): 20 years of imprisonment, of which the first three years are to be served in prison, with the remainder to be served in… Status: imprisoned; deprived of liberty since September 17, 2025; place of detention: Prison, Ulyanovsk Oblast. Recognition: Memorial: Support for Political Prisoners — recognised as a political prisoner, February 12, 2026.
In brief
Military personnel · Terrorism cases
Sentence
20 years
of imprisonment, of which the first three years are to be served in prison, with the remainder to be served in a high-security penal colony
No information about an appeal ruling.
Charges
- Article 205.3, Russian Criminal Code — Receiving training for the commission of terrorist crimes
- Article 205.5 part 2, Russian Criminal Code — Participation in the activities of a terrorist organization
Latest event
February 12, 2026 — recognised as a political prisoner
Memorial: Support for Political Prisoners
Recognition by rights defenders
- Recognised as a political prisoner — Memorial: Support for Political Prisoners, February 12, 2026
Timeline
· Recognised as a political prisoner
Memorial: Support for Political Prisoners
· First-instance verdict
guilty verdict · 20 years
· Added to the Rosfinmonitoring list of “terrorists and extremists”
· Persecution begins
Sergei Yatskov's case on participation in the activities of a terrorist organisation
Criminal case
Sergei Yatskov's case on participation in the activities of a terrorist organisation
- Case number
- 1-547/2025
Write a letter
Facility: Prison, Ulyanovsk Oblast
Address (in Russian, as written on the envelope)
433513, ул. Калугина д. 66, Ульяновская область, г. Димитровград, ФКУ «Тюрьма УФСИН Ульяновской области», Яцков Сергей Александрович, 1980 г.р.
Details and sources
Full summary
A Ukrainian serviceman, presumed to have been captured in January 2025, was charged with participation in a terrorist organisation and undergoing training for the purpose of carrying out terrorist activities, due to his alleged involvement with the Noman Chelebidzhikhan Assault Battalion. The case went to trial in June 2025, and on 22 August 2025 Yatskov was sentenced to 20 years in a strict-regime penal colony.
All fields of the record
- Citizenship
- Ukraine
Other people prosecuted under Article 205.3, Russian Criminal Code
Under the same article, not necessarily in the same case.