Thirty-six nations, including European states, Australia, and Costa Rica, have agreed to join a special tribunal aimed at prosecuting Russia for its invasion of Ukraine. This initiative seeks to address the crime of aggression.

Thirty-four European states plus Australia, Costa Rica and the EU said on Friday they would join a future special tribunal for Ukraine to prosecute Russia over its invasion of the country. Ukrainian President Volodymyr Zelensky signed an accord with the Council of Europe last year to create a legal body to prosecute the “crime of aggression” in the invasion Russia launched in February 2022. The Council of Ministers, comprising foreign ministers from the organisation’s 46-member states, in a...