Russia struck the Kyiv headquarters of Kyivstar, Ukraine's largest mobile provider, on Sunday as it widened a campaign against the country's data centres. The company told Interfax Ukraine that no one was hurt in the attack.

Russia's defence ministry said it hit a data centre belonging to Vodafone Ukraine, the country's second-largest mobile network. Reuters reported that Vodafone did not respond to requests for comment.

Ukrainian President Volodymyr Zelenskiy said Russia struck a Kyiv data centre twice on Sunday morning, wounding two children and an adult. Earlier strikes this week disrupted internet services for about 100,000 households in Kyiv and the surrounding region, according to Ukraine's digital ministry.

Foreign minister Andrii Sybiha said Russia was trying to disrupt the flow of information. Rapid air-raid alerts, which arrive through phones and apps, depend on civilian internet links. Reuters could not independently verify Moscow's military claims.

The campaign shows how the war is spreading from battlefields to the networks that keep civilian life running.