The cyber-attacks that hit Ukraine’s government websites and banks on Tuesday are the largest in the country’s history.

The Minister of Digital Transformation, Mykhailo Fedorov said on Wednesday.

“All the authorities responsible for cyber security worked to counter these attacks and eliminate them,’’ Fedorov was quoted by the Interfax-Ukraine news agency as saying.

The distributed denial-of-service (DDoS) attacks, which cost an estimated “millions of U.S. dollars,’’ were prepared beforehand and were aimed at destabilizing the situation and sowing panic in Ukraine, the minister said.

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Currently, the DDoS attack on the Ukrainian government websites has not yet stopped, but it is under control, according to Fedorov.

Earlier on Tuesday, the cyber-attacks struck the website of the Ukrainian Defence Ministry, the Armed Forces of Ukraine, and two government-owned banks, Privatbank and Oshchadbank.