Ukraine was hit by a massive cyberattack warning its citizens to 'be afraid and expect the worst', and Russia, which has massed more than 100,000 troops on its neighbor's frontier, released TV pictures on Friday of more forces deploying in a drill.

The developments came after no breakthrough was reached at meetings between Russia and Western states, which fear Moscow could launch a new attack on a country it invaded in 2014.

'The drumbeat of war is sounding loud,' said a senior U.S. Diplomat.

Russia denies plans to attack Ukraine but says it could take unspecified military action unless demands are met, including a promise by the NATO alliance never to admit Kyiv.

Russia said troops in its far east would practice deploying to far-away military sites for exercises as part of an inspection. Defense Ministry footage released by RIA news agency showed numerous armored vehicles and other military hardware being loaded onto trains in the Eastern Military District.

'This is likely cover for the units being moved towards Ukraine,' said Rob Lee, a military analyst and a fellow at the U.S.-based Foreign Policy Research Institute.

The movements indicated Russia has no intention of dialing down tensions over Ukraine, having used its troop build-up to force the West to the negotiating table and press sweeping demands for 'security guarantees' - key elements of which have been described by the United States as non-starters.

Ukrainian authorities were investigating a huge cyberattack, which hit government bodies including the ministry of foreign affairs, cabinet of ministers, and security and defense council.

'Ukrainian! All your personal data was uploaded to the public network. All data on the computer is destroyed, it is impossible to restore it,' said a message visible on hacked

government websites, written in Ukrainian, Russian and Polish.

'All information about you has become public, be afraid and expect the worst. This is for your past, present and future.'

Ukraine's foreign ministry spokesperson told Reuters it was too early to say who could be behind the attack but said Russia had been behind similar strikes in the past. Russia did not immediately comment but has previously denied being behind cyberattacks on Ukraine.

The Ukrainian government said it had restored most of the affected sites and that no personal data had been stolen. Several other government websites had been suspended to prevent the attack from spreading.

The European Union's top diplomat, Josep Borrell, condemned the attack and said the EU's political and security committee and cyber units would meet to see how to help Kyiv: 'I can't blame anybody as I have no proof, but we can imagine.'

The message left by the cyberattack was peppered with references that echoed long-running Russian state allegations, rejected by Kyiv, that Ukraine is in the thrall of far-right nationalist groups. It referenced Volhynia and Eastern Galicia, the site of killings carried out in Nazi German-occupied Poland by Ukrainian insurgents, a point of contention between Poland and Ukraine.

The United States warned on Thursday that the threat of a Russian military invasion was high. Russia has consistently denied that.

Moscow said dialogue was continuing but was hitting a dead end as it tried to persuade the West to bar Ukraine from joining NATO and roll back decades of alliance expansion in Europe.

The United States and NATO have rejected those demands but said they are willing to talk about arms control, missile deployments, confidence-building measures and limits on military exercises.

Russian Foreign Minister Sergei Lavrov said on Friday that Moscow was awaiting a point-by-point written response to its proposals.

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