The Biden administration's Deputy National Security Adviser for Cyber and Emerging Technology Anne Neuberger claimed on Friday that Russian cyber actors have recently targeted Ukrainian government agencies, including the country's military ministry.

The Kremlin denied it was behind the denial-of-service attacks, which involve overloading a website with millions of requests.

On its account, the Russian Embassy to the United States has also rejected the US accusations on Saturday, reiterating that Russia was not involved in the cyberattacks.

“We categorically reject the unfounded statements of the [US] administration and stress that Russia was not involved in the mentioned events and has not conducted any malicious operation in cyberspace," the embassy tweeted.

We have taken note of purely anti-Russian statements of Deputy National Security Advisor Anne Neuberger, who accused the Russian special services of cyberattacks on Ukrainian defense agencies and banks. pic.twitter.com/AVuyQ8swWl

— Russian Embassy in USA 🇷🇺 (@RusEmbUSA) February 19, 2022

The Ukrainian government later announced the restoration of most of the websites, and denied leaking personal information, but described the attack as the worst in the past four years.

Relations between Russia and NATO, led by the United States, have recently been tense due to its increased military presence near the Russian border under the pretext of protecting Ukraine from a "potential Russian invasion", which Moscow considers a violation of the basic document of relations between the two sides. 

It is worth mentioning that Western intelligence services occasionally accuse Russian actors of being behind such syberattacks as part of Washington's ongoing disinformation campaign against Russia, but the Kremlin constantly denies such allegations.