Ukraine says evidence points to Russia being behind cyber-attack

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Tensions are at an all-time high between Ukraine and Russia, which Kyiv accuses of having massed troops on its border before a possible invasion. Some analysts fear the cyber-attack could be the prelude to a military attack.

The Kremlin rejected the claims and said there was no evidence Russia was behind the attack.

Kyiv said late on Friday that it had uncovered preliminary clues Russian security services could have been behind the cyber-attack.

The SBU security service said the attacks in the early hours of Friday had targeted a total of 70 government websites.

Microsoft warned on Sunday that the cyber-attack could prove destructive and affect more organisations than initially feared. The company said it continued to analyse the malware and warned it could render government digital infrastructure inoperable.

It said it had not yet identified a culprit behind the attacks but warned that the number of affected organisations could prove larger than initially thought.