On Christmas Day, the Estlink 2 submarine cable that carries electricity from Finland to Estonia was disconnected from the grid, just over a month after two telecommunications cables were severed in Swedish territorial waters in the Baltic.
"Spoke with (Finnish President) Alexander Stubb about the ongoing Finnish-led investigation into possible sabotage of undersea cables. I expressed my full solidarity and support," NATO chief Mark Rutte said on X.
Finnish authorities on Thursday said they were investigating the oil tanker, Eagle S, that sailed from a Russian port, as part of a probe for "aggravated sabotage".