The two countries say they are "deeply concerned" as they raise the possibility of sabotage.

The cause of broken underwater cable in the Baltic Sea is not yet known. The C-Lion1 cable is the only undersea cable connecting Finland to central Europe.

Germany and Finland launched a probe Monday after an undersea cable linking the countries was severed, warning of the threat of "hybrid warfare" amid heightened tensions with Russia. "Our European security is not only under threat from Russia's war of aggression against Ukraine, but also from hybrid warfare by malicious actors."

Germany and Finland launched a probe Monday after an undersea cable linking the countries was severed, warning of the threat of "hybrid warfare" amid heightened tensions with Russia. "Our European security is not only under threat from Russia's war of aggression against Ukraine, but also from hybrid warfare by malicious actors."

German and Finland expressed deep concern over the discovery Monday of a severed undersea data cable between the countries through the Baltic Sea, saying it raised suspicions of sabotage and that an investigation ...

A critical underwater internet cable linking Finland to Germany has been severed, sparking fears of Russian sabotage.