Russia doesn't need to blow up the pipeline....just turn off the spigot. They literally lose that leverage by it getting blown up...Russia most likely did this. It sends a message that they can hit other pipelines. And, I heard a blurb on NPR this morning that the point of attack, and the ownership of the pipelines is critical to look at. The attacks were off the coast of Denmark, which is not a full member of NATO, and the ownership of the pipelines are through Switzerland. No NATO response required if the attacks are eventually traced back to Russia.
The person on NPR also suggested an attack most likely came from a commercial ship used by Russia, which could be masked as normal traffic in the Baltic.
Doesn't make any sense.