Russia has in recent months tried to gain intelligence to sabotage critical infrastructure in the Dutch part of the North Sea, Dutch military intelligence agency MIVD said on Monday.

A Russian ship has been detected at an offshore wind farm in the North Sea as it tried to map out energy infrastructure, MIVD head General Jan Swillens said at a news conference.

The vessel was escorted out of the North Sea by Dutch marine and coast guard ships before any sabotage effort could become successful, he added.

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“We saw in recent months Russian actors tried to uncover how the energy system works in the North Sea. It is the first time we have seen this,” Swillens said.

Read more: yahoo