A state actor's involvement in the explosions that damaged the Nord Stream pipelines under the Baltic Sea last year is the "absolute main scenario," although confirming identity will prove difficult, the Swedish prosecutor investigating the attacks said on April 6. The blasts in the Swedish zone of the pipeline occurred at a depth of 80 meters, which the Swedish prosecutor said made it complicated to investigate. "We believe it will be rather difficult to determine who did this," prosecutor Mats Ljungqvist told Reuters in a phone interview. To read the original story by Reuters, click here.