Two undersea cables carrying internet data deep in the Baltic Sea were damaged, European telecommunications companies said this week, drawing warnings from European governments of possible Russian "hybrid warfare" targeting global communications infrastructure.

Two major underwater fiber-optic cables in the Baltic Sea were severed this week in what European officials suspect is another act of Russian sabotage, marking an escalation in Moscow’s

The foreign ministries of Germany and Finland said Monday they were "deeply concerned" by the severing of an undersea cable connecting the two countries.