A massive cyber-attack struck organisations around world
A massive cyber-attack using tools believed to have been stolen from the US National Security Agency has struck organisations around the world.
Cyber-security firm Avast said it had seen 75,000 cases of the ransom ware- known as WannaCry and variants of that name - around the world.
There are reports of infections in 99 countries, including Russia and China.
Among the worst hit was the National Health Service in England and Scotland.