Two pro-Ukraine hacking groups claimed to have carried out a year-long operation to penetrate Aeroflot's network

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.

By Alexander Marrow and Gleb Stolyarov (Reuters) -Russian airline Aeroflot cancelled dozens more flights on Tuesday but said it had now stabilised its schedule after a major cyberattack a day earlier,