A huge range of organisations around the world have been affected by the WannaCry ransomware cyberattack, described by the EU's law enforcement agency as "unprecedented". Here are some of the most prominent victims, from Britain's National Health Service (NHS) to French carmaker Renault and the Russian interior ministry.
Pictures on social media showed screens of NHS computers with images demanding payment of $300 (230 pounds, 275 euros) in the virtual currency Bitcoin, saying: "Ooops, your files have been encrypted!"