The material will be submitted to Ukraine’s foreign ministry and Prosecutor General’s Office, Pavel Latushka, deputy head of the Belarusian opposition’s government-in-exile, told Polish state news agency PAP.
Experts working with the exiled Belarusian opposition presented evidence at a meeting on Friday which they said documented the Lukashenko regime’s involvement in Russia’s aggression against Ukraine, PAP reported.
“We are preparing a consolidated body of evidence [...] which we hope will be used as part of an investigation to be launched within the framework of the Special Tribunal for the Crime of Aggression against Ukraine,” Latushka said.
The planned tribunal is intended to investigate and prosecute senior officials responsible for the crime of aggression against Ukraine, filling a gap in the jurisdiction of the International Criminal Court.
In May, 36 countries and the European Union signed an agreement establishing a management committee that will oversee the tribunal’s organizational launch, including its budget and administrative structure.
Latushka urged democratic countries to move quickly with the ratification process needed for the body to begin its work.
Latushka, who is now based in Warsaw, served as Belarus’s ambassador to Poland from 2002 to 2008 before later breaking with the Lukashenko regime and joining the opposition.
How Belarus aided Moscow
Belarusian opposition groups have long accused Lukashenko, a key ally of Russian President Vladimir Putin, of enabling the Kremlin’s full-scale of Ukraine by allowing Belarusian territory and infrastructure to be used by Moscow’s forces.
Russian troops entered northern Ukraine from Belarus when the full-scale invasion began in February 2022, while Russian aircraft and missiles have also operated from Belarusian territory.
Latushka said Belarusian democratic forces want Lukashenko held accountable for alleged complicity in Russia’s aggression, as well as crimes against humanity and alleged war crimes linked to the transfer of Ukrainian children from Russian-occupied territories to Belarus and their subsequent indoctrination.
Crackdown at home
Latushka also called on other countries to support Lithuania’s referral of Belarus to the International Criminal Court over alleged forced deportations and the persecution of civil society and political opponents.
Lithuania referred the situation to the court in September 2024, and the ICC opened an investigation into possible crimes against humanity committed by the Belarusian regime in March 2026.
The repression intensified following Belarus’s disputed 2020 presidential election, which handed Lukashenko another term in office and sparked mass protests across the country.
Between 300,000 and 500,000 Belarusians are estimated to have fled the country following the crackdown, according to a 2023 report by the Council of Europe.
Latushka told PAP that Polish authorities had so far not joined Lithuania in supporting the referral.