HELSINKI (Reuters) -Finland's public transport agency said on Wednesday that an oil tanker suspected of damaging undersea cables in the Baltic Sea was found to have serious deficiencies and will not be allowed to operate until repairs have been made. Baltic Sea nations are on high alert after a string of power cable, telecom link and gas pipeline outages since Russia invaded Ukraine in 2022. Finnish police on Dec. 26 seized the Eagle S tanker carrying Russian oil and said they suspected the vessel had damaged the Finnish-Estonian Estlink 2 power line and four telecoms cables by dragging its anchor across the seabed.