Mass unrest at the Odessa Trade Unions Building in Odessa on May 2, 2014, which culminated in the deaths of nearly 50 anti-Maidan activists - most of them burning alive in the building. Photo: Odessa Media News Agency/Sputnik/File photo.

Mass unrest at the Odessa Trade Unions Building in Odessa on May 2, 2014, which culminated in the deaths of nearly 50 anti-Maidan activists - most of them burning alive in the building. Photo: Odessa Media News Agency/Sputnik/File photo.