Two fibre-optic undersea cables in the Baltic Sea were severed on Sunday and Monday, raising suspicions over a Chinese cargo vessel, which the Danish navy is currently shadowing through the Kattegat strait between Denmark and Sweden.

Swedish investigators are looking into the movements of a Chinese vessel in the Baltic Sea after two internet cables were severed in what some Western leaders suspect was an act of sabotage.

Germany’s defense minister said damage to two fiber-optic cables on the sea floor appeared deliberate, but a culprit was not known.