The incidents rank among the most disruptive cyber operations since the US conflict with Iran began in February, a period that has also seen digital assaults on the Los Angeles transit network, American water treatment facilities, and shipping bound for US ports.A second round of attacks this month extended beyond French borders, affecting more than 100 establishments across Europe.A similar episode struck at least six US military commissaries in August, with Pentagon investigators treating those malfunctions as a suspected cyberattack.The Pentagon confirmed it was examining the matter but declined further comment on security grounds.