Ukrainian euro integration supporters wave flags during their meeting on Independence Square in Kiev yesterday. Protesters have been demanding that the Ukrainian government roll back last week’s decision to suspend work on a landmark association agreement with the European Union, calling for president Viktor Yanukovych to sign the deal. Photograph: EPA/Sergey Dolzhenko

The European Union yesterday issued a stark warning to Russia that it was in danger of breaching the Helsinki Accords over its treatment of Ukraine, a(...)