Cinia working with authorities to investigate what caused outage in 745-mile line between Germany and Finland

A fibre optic communications cable linking Finland and Germany along the seabed has stopped working and may have been severed by an outside force, Finnish state-controlled cyber-security and telecoms network company Cinia has said.

The 745-mile (1,200km) C-Lion1 cable running through the Baltic Sea from Finland’s capital Helsinki to the German port of Rostock malfunctioned just after 02.00 GMT, the company said.

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