"The information system of Odesa International Airport came under a hacker attack. All airport services are operating in an enhanced mode," the airport said on Facebook.

Kyiv Metro's computer system has also been attacked by hackers. This may be one of the modifications of the Petya.A virus, Frontnews reported, referring to its own sources.

Read alsoUkraine cyber security firm warns of possible new attacksAs Kyiv Metro's press service reported on Facebook, the subway is operating as usual, except for banking services.

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"The subway is working in normal mode, except for banking services (payment by contactless bank cards on the yellow turnstile or MasterPass)," the report says.

In addition, the Ministry of Infrastructure also came under cyber attack, 112 Ukraine reports with reference to sources. In turn, the cyberpolice said there were no cyberattacks on the website of the Ministry of Infrastructure.

"The ministry is carrying out technical work," the head of Ukraine's Cyberpolice, Colonel Serhiy Demydiuk, said.