Ukraine is facing a substantial fine over delays in the organisation of May's Eurovision song contest and a decision to bar Russia's entrant from entering Ukraine.
A ransomware virus attack hit computers across the world, taking out servers at an oil company, banks, and shutting down servers at multinational companies.
Russia's state broadcaster has said it will boycott this year's Eurovision song contest after the host country, Ukraine, said it would bar entry to the Russian contestant and Moscow rejected two possible compromises suggested by organisers.
