The Russian military was directly behind a “malicious” cyber-attack on Ukraine that spread globally last year, the US and Britain have said.
The White House said June’s NotPetya ransomware attack caused billions of dollars in damage across Europe, Asia, and the Americas.
UK Defence Secretary Gavin Williamson said Russia was “ripping up the rule book” and the UK would respond.
Moscow denies being behind the attack, calling such claims “Russophobic”.
Read more on BBC.