Ukrtelecom, a significant Ukrainian internet and phone line provider, was the victim of a “powerful cyberattack” on Monday, according to Ukrainian officials.

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According to a tweet from Ukraine’s State Service of Special Communications and Information Protection, the cyberattack has been “neutralised,” and as the recovery from the hack proceeds, priority has been given to sustaining communications services for Ukraine’s military.

In an apparent allusion to Russia, the CIA blamed the attack on “the enemy.”

According to NetBlocks, which measures internet connectivity, connectivity at Ukrtelecom, which bills itself as the “largest fixed line operator in Ukraine,” fell to 13 percent of pre-war levels on Monday.

As the Russian assault of Ukraine continues, Ukrainian telecom providers have been subjected to a wave of hacking.

Hackers disrupted service at Triolan, a Ukrainian internet service provider with consumers in major cities, earlier this month.

While the cyber war aspect of Russia’s invasion of Ukraine has been more subdued than most feared, it has continued. Telecom businesses have been subjected to several cyberattacks, but have largely avoided major consequences.

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Ukraine’s Computer Emergency Response Team (CERT) disclosed last week that the country had been subjected to 60 different cyberattacks. It said that 11 of the attacks targeted government and municipal officials, with the remaining eight targeting military and law enforcement.

Only four had struck telecommunications and other technology firms. The majority of the assaults were intended at obtaining information, although a series of “wiper” operations aiming at wiping data on targeted machines was launched throughout Ukrainian businesses.

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“Despite the growing number of attacks, most of them reach no success,” the CERT found. “Even those that are successful, almost have no impact on the work of the critical infrastructure.”

Ukraine’s telecommunications providers are also under pressure to keep the internet running in the face of rocket attacks. According to a Forbes magazine report, teams were travelling into bombed areas like Kharkiv and Okhtyrka during the quieter hours to replace and repair equipment.