Finnish authorities say they have opened an investigation into the rupture of a data cable under the Baltic Sea, adding to a Swedish probe into the possible sabotage of that link and another cable.

Two undersea fibre-optic communications cables in the Baltic Sea, including one linking Finland and Germany, were severed, raising suspicions of sabotage by bad actors, countries and companies involved said on Monday.

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.