A cyber attack on Russia's largest airline on Monday saw dozens of canceled flights after a pro-Ukraine team took responsibility for hacking airline computer systems.

Russian airline Aeroflot was forced to cancel more than 50 round-trip flights on Monday, disrupting travel across the world's biggest country, as two pro-Ukraine hacking groups claimed to have inflicted a crippling cyberattack.

A cyberattack by pro-Ukraine groups Silent Crow and Belarusian Cyberpartisans forced Russia's Aeroflot to cancel over 40 flights, disrupting travel nationwide. Hackers claimed to neutralize 7,000 servers.