According to the New York Times, Boris Pistorius, Germany’s defense minister, believes that undersea cables connecting Finland and Germany that were severed on Monday were not damaged by accident, the New York Times reports.

The C-Lion1 cable between Finland and Germany was severed in the Baltic Sea, its operator said, after damage was reported to another cable linking Lithuania and Sweden.

Germany’s defense minister says officials have to assume that damage to two data cables under the Baltic Sea was caused by sabotage.