A group known as Cyberpartisans says it hacked into the computers and security systems of a major Belarusian state-run producer of nitrogen compounds and fertilizers and is demanding the release of workers who were arrested during protests against the disputed 2020 presidential election.
The Crisis In Belarus
Read our coverage as Belarusian strongman Alyaksandr Lukashenka continues his brutal crackdown on NGOs, activists, and independent media following the August 2020 presidential election.
The group claimed that it took control of all internal e-mail accounts of the Hrodna Azot plant in the Hrodna region as well as hundreds of computers, servers belonging to the facility, and the security system and security cameras in the plant's buildings. In addition, the plant's heating center stopped functioning due to the cyberattack.
The hackers say they will undo their work in exchange for the release of all the workers of the facility incarcerated for participating in the 2020 protests against the official results of the presidential poll that named authoritarian ruler Alyaksandr Lukashenka the winner. The hackers also demand 75 other political prisoners with medical conditions be released.
Hrodna Azot's website has not been accessible since April 17.
An employee of the plant told RFE/RL on April 18 on condition of anonymity that "there was a big buzz at the plant" the day before.
"People have been discussing that. Everybody knows what happened and who did it. But I do not know to what extent the attack affected the work," the employee said.
Official representatives of Hrodna Azot refused to comment and hung up the phone when RFE/RL correspondents called to request comment.
Yulyana Shametavets of the Cyberpartisans group told RFE/RL on April 18 that the cyberattack had been prepared for several months.
"The attack was huge enough and may have affected not only documentation and networks but the production of outputs as well," Shametavets said, adding that the attack revealed the weakness of the electronic systems used by industrial facilities in Belarus.
An unspecified number of the facility's workers were arrested during and after the 2020 rallies and many were later handed lengthy prison terms.
In February 2023, a court in the Homel region sentenced 10 activists of the Rabochy rukh (Workers' Movement) consisting of workers of Hrodna Azot on charges of high treason and creation of an extremist group. The Rabochy rukh movement was created in 2020 amid nationwide protests against the disputed reelection of Lukashenka.
Alyaksandr Kapshul and Uladzimer Zhurauka were sentenced to 15 years in prison each then; Syarhey Shelest, Andrey Paheryla, and Alyaksandr Hashnikau to 14 years in prison each; Syarhey Dzyuba, Ihar Mints, Valyantsin Tseranevich, and Syarhey Shametska to 12 years in prison each; and Hanna Ablab, the only woman in the group, to 11 years in prison.
Kapshul was also convicted of illegal use of a firearm, while Shelest, Zhurauka, and Paheryla were additionally found guilty of slander.
All members of the group, which went on trial in November 2023, pleaded not guilty at the time.
The movement tried to organize strikes at Hrodna Azot and another factory, the Belarusian Steel Works (BMZ), also located in the southeastern Homel region.
Investigators claim the activists collected sensitive information and passed it to representatives and organizations of foreign countries, including the United States and Lithuania.
Lukashenka, 69, has tightened his grip on the country since the August 2020 election by arresting -- sometimes violently -- tens of thousands of people. Fearing for their safety, most opposition members have fled the country.
The West has refused to recognize the results of the election and does not consider Lukashenka to be the country's legitimate leader. Many countries have imposed several rounds of sanctions against his regime in response to the suppression of dissent in the country.