This is how the sabotage investigation can proceed

The investigators will, among other things, look at suspicious maritime traffic in the area, according to Liwång.

But something that will complicate the investigation is that the supposed explosive charges may have been placed a long time ago, in theory already when the gas lines were laid.

- This means that it could take years, there are huge amounts of data to go through, says Liwång.

On the pipes themselves, it is very unlikely that there are traces left after the powerful explosions, emphasizes Liwång.

So far, there is too little information to pinpoint an actor behind the suspected crime.

- All countries around the Baltic Sea have this capacity and many organizations and companies as well.

So from what we know now, no one can be ruled out.

What clues will investigators be looking for?

Hear Hans Liwång in the segment.