The cyberattacks took place from Monday to Thursday, according to the news outlet, which cited sources from Ukraine’s Main Intelligence Directorate (HUR).

Over 800 Russian servers were reportedly affected, leading to the loss of military, administrative and financial documents.

Mobile internet banking services with two Russian banks, the Moscow Credit Bank and Rosselkhozbank, were also reportedly interrupted as a result of the attacks.

An unnamed Ukrainian military intelligence source cited by the Kyiv Post said: “The loss of data and documentation has led to a partial or complete halt in the operations of service providers and consumers across various sectors.”

“It will require significant resources to search for and recover lost data, further demonstrating to the local population the poor technical infrastructure of the Russian Federation,” the source added.

The reported data breaches are the latest in a series of coordinated cyberattacks by Ukrainian military intelligence specialists as part of the war against Russia.

Several distributed denial-of-service (DDoS) attacks in July resulted in severe disruptions to services affecting Russia’s central bank and social media networks.