Detained on 11 February 2016 during mass searches and detentions in Crimea. Arrested on suspicion of participation in the activities of Hizb ut-Tahrir, banned as a terrorist organisation. In July 2016, he was placed in a special block of the pre-trial detention centre as a "dangerous person under investigation". In January 2017, he was also accused of preparing for a violent seizure of power. On 12 November 2019, he was sentenced to 12 years in a strict regime colony. In January 2020, it became known that Siruk was placed in a special block in pre-trial detention centre №3 in Rostov region.