A hackers’ attack on Ukraine’s top mobile carrier Kyivstar caused large-scale failures in communications and internet on Tuesday morning, the company said.
“This morning, we were the target of a powerful hacker attack. It caused a technical failure, resulting in mobile communications and access to the internet becoming temporarily unavailable,” Kyivstar said on Facebook, adding consumer data had not been compromised.
Law enforcement agencies and special government services were looking into the incident, the operator said.
“It’s a challenge for us,” Kyivstar said.
The company serves 24.3 million mobile subscribers.
Ukrainian Interior Minister Igor Klymenko earlier reported “large-scale failures” in Kyivstar’s network, leaving “many subscribers” without service.
The breakdown also affected other sectors relying on mobile roaming.
Authorities of the northeastern city of Sumy said the air raid alert system “will not work temporarily”.
The blackout affected a number of other services and businesses in the country fighting off a Russian invasion for almost two years.
PrivatBank spokesman Oleg Serga said its banks and cash terminals were partly disrupted, according to public broadcaster Hromadske.
One of Ukraine’s biggest banks, Monobank, said it had been targeted by a “massive DDoS attack”, its co-founder Oleg Gorokhovsky said on Telegram.
