A National Health Service (NHS) board in front of the Houses of Parliament in London. According to security experts, it exploited a vulnerability that was discovered and developed by the US's National Security Agency. Reuters reported that employees of Britain's National Health Service (NHS) were warned about the ransomware threat earlier today. Britain's health's secretary, Jeremy Hunt, was briefed by cyber security experts, while Prime Minister Theresa May's office said she was monitoring the situation. The National Cyber Security Centre, an arm of the GCHQ, the British electronic surveillance agency, said it was investigating the attack.

Source: The Telegraph May 12, 2017 21:11 UTC