The detention by Finnish authorities of a Russian-linked oil freighter on suspicion of using its anchor to cut undersea cables has refocused global attention on this unique infrastructural vulnerability.

An oil freighter with ties to Russia is being blamed for severing a cable between Finland and Estonia, cutting off 658 megawatts of power.{ai:summary}<p>Finnish authorities detained a Russian-linked oil freighter, suspecting it used its anchor to sever undersea cables. This incident has highlighted the global vulnerability of critical underwater infrastructure. </p><p>#foreignaffairs</p>

Underwater battleground: What are undersea cables and why is Russia accused of cutting them?

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