Mikalai Dziadok is a blogger and activist of an anarchist movement. He was detained on November 12, 2020, by officers of GUBAZIK and the Interior Ministry. He was severely beaten and reportedly tortured during and after arrest. Mikalai was taken to the detention center in Akrescin Street and later transferred to the pre-trial detention center in Valadarski Street.

Dziadok was charged under Part 1 of Art. 342 of the Criminal Code (organization or participation in group actions that grossly violate public order).

On March 31, 2021, the Investigative Committee's press service said that Dziadok was facing new charges under Part 3 of Article 361 (calls for actions aimed at harming the national security of the Republic of Belarus) and Part 1 of Article 295-3 (Illegal actions in relation to combustible items) of the Criminal Code.

On November 10, 2021, the Minsk City Court sentenced Mikalai Dziadok to five years in a general-security penal colony. Judge Anastasiya Papko found him guilty of “organizing and preparing actions that grossly violate public order, or active participation in them” (Art. 342), “calls for actions aimed at harming the national security of the Republic of Belarus” (Art. 361) and “illegal actions with regard to combustible substances” (Art. 295-3 of the Criminal Code).

On January 25, 2022, a panel of the Supreme Court consisting of Uladzimir Davydau, Andrei Kavalchuk, and Mikalai Hryntsevich considered Mikalai Dziadok's appeal and left it without satisfaction and the sentence unchanged.

It is known that Mikalai is subjected to pressure in prison: he was placed in a punishment cell, assigned a so-called low-status job, and deprived of a long-term visit. There are also problems with his correspondence. On March 10, 2022, the administration punished Dziadok with four months in a cell with a stricter detention regime for protesting against obstruction of his correspondence and persecution of those convicts who communicate with a political prisoner. Two inmates who continued to communicate with him were placed in a punitive confinement cell.

On June 28, 2022, Horki District Court considered a case for the transfer of Mikalai Dziadok to another type of penitentiary institution and change his custody level. Judge Stanislau Liashenka ruled to transfer the political prisoner to a high-security prison regime for two years and 10 months.