The websites of Ukrainian government institutions were subjected to large DDOS attacks on Wednesday evening, according to Mikhailo Fedorov, Ukraine's minister of digital transformation.

On his Telegram channel, Fedorov detailed how "at about 16:00 [14:00 GMT], another massive DDoS attack on our state began. There is relevant data from a number of banks, there are also problems with access to the websites of the parliament, It is already working, the Cabinet of Ministers, and the Ministry of Foreign Affairs."

Last week, the Biden administration's Deputy National Security Advisor for Cyber and Emerging Technology Anne Neuberger claimed 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.

Ukraine mobilized its military reserve and urged its approximately three million citizens living in Russia to leave Russian territory.

Ukrainian President Volodymyr Zelensky has put Kiev's more than 200,000 reservists on notice that they will receive a summons to return to their units.

Moscow also said it would evacuate diplomatic personnel from Ukraine to protect their lives.

The recent measures come following Russian President Vladimir Putin's recognition of the sovereignty of the People's Republic of Donetsk and Lugansk in the Donbass region.