The hack may have been part of a campaign to disrupt the sense of normalcy Russians have mostly enjoyed since the start of the war.

Russian prosecutors confirmed to Reuters that the disruption was caused by a hack and have opened a criminal investigation into it. Russian lawmakers also hinted a cyberattack was the cause of the outage, with one of them, Anton Gorelkin, saying Russia was under digital attack, possibly at the hands of hacktivists with help from unfriendly states.

By Dmitry Antonov, Filipp Lebedev and Gleb Stolyarov MOSCOW (Reuters) -Russian airline Aeroflot was forced to cancel more than 50 round-trip flights on Monday, disrupting travel across the world's biggest country,