# German officials suspect sabotage after Baltic Sea cable damage
Germany has said it must assume that damage to undersea fibre-optic communications cables in the Baltic Sea was sabotage, after separate outages affected links between Finland and Germany and between Sweden and Lithuania.
The suspicion has turned a technical fault into a broader European security concern. German defence minister Boris Pistorius said in Brussels that no one believes the cables were accidentally damaged and that the government has to proceed on the basis that the incident was deliberate, even before investigators have established exactly what happened. Sweden’s civil-defence minister, Carl-Oskar Bohlin, said a preliminary investigation into sabotage had been opened after ship movements seen on maritime surveillance corresponded to the damage. Sweden and Finland have also announced a joint investigation.
The two incidents happened on consecutive days. One affected a 135-mile internet link between Lithuania and the island of Gotland in Sweden, which Telia Lietuva said stopped working on Sunday morning. The other cut a 746-mile cable between Helsinki and the German port of Rostock, which Finnish cybersecurity and telecoms company Cinia said failed early on Monday. Together, the outages highlighted how exposed the region’s undersea data links are, and how quickly speculation about sabotage spreads when infrastructure in the Baltic stops working.
Officials have been cautious about naming a culprit, but the political context is hard to miss. The same stretch of water has already been associated with several suspected attacks, including the explosions on the Nord Stream gas pipelines in 2022. German foreign minister Annalena Baerbock and her Finnish counterpart Elina Valtonen said in a joint statement that they were deeply concerned and that a thorough investigation was under way. Baerbock separately said Germany was seeing similar problems elsewhere, including cyber-attacks, surveillance of critical infrastructure and parcels that had exploded while being transported on planes, and added that these could not all be coincidences.
The Baltic states and the Nordic region have treated the damage as part of a wider pattern of pressure on critical infrastructure. The Lithuanian navy said it would intensify surveillance in the affected areas. Sweden has also recently moved to veto 13 offshore wind farms in the Baltic on security grounds, after the Swedish armed forces warned the projects would make Nato’s newest member harder to defend.
NATO’s allied maritime command said threats to undersea infrastructure had increased and warned that such attacks show how vulnerable the systems are. The command said it was stepping up patrols near undersea infrastructure. Its warnings fit a broader concern voiced earlier this year by Vice Admiral Didier Maleterre, the deputy commander of the command, who said Russia had developed extensive hybrid warfare beneath the sea to disrupt the European economy through cables, internet links and pipelines.
The scale of the risk helps explain the reaction. Undersea infrastructure carries communications and energy flows that modern societies depend on but rarely see. When a cable fails, the immediate question is usually technical. When multiple cables in the same region stop working close together, the question becomes geopolitical.
For now, that geopolitical question remains unanswered. No public conclusion has been reached on who caused the damage or whether the incidents are linked. But the official language from Berlin, Stockholm and Helsinki shows that European governments are treating the Baltic not simply as a maritime transport route, but as a contested zone where sabotage, espionage and infrastructure vulnerability are now part of the same security picture.
The next stage will be for investigators to determine whether the damage was accidental, criminal or part of a wider campaign. Until then, the response itself may be the clearest sign of how seriously the region now takes the threat to its underwater networks.
