The heartbroken brother of Irishman Finbar Cafferkey who was killed while battling Russian forces in Ukraine said his sibling was "fair-minded" and "strong-willed".
Colm MacEachmharcaigh made the comments after a "threatening" statement was issued by the Russian Embassy about his brother's death.
Russian Ambassador Yuri Filatov also appeared to suggest that Ireland could find itself at war with Russia.
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The Russian Embassy in Ireland said that it was the “Irish Government and media who bear responsibility for the death of Finbar Cafferkey”.