“A Norwegian undersea surveillance network that is capable of detecting submarines has had its cables mysteriously cut ... The cables were cut and then disappeared, with the Institute of Marine Research describing 'extensive damage‘ ... has been offline since the outage in April ... was likely they were cut deliberately. The damage could not have been an accident.”
https://www.dailymail.co.uk/news/ar...ble-detecting-submarines-cables-cut.html

That is certainly Moscow’s M.O and it is in favor of Russia’s interests to blind its competitors to its activity in the Baltic. This isn’t a new development, but it is still relevant as well as interesting.