STOCKHOLM, Sweden – Two people were arrested Wednesday after a worker was stopped at the entrance of a Swedish nuclear plant with a bag containing traces of an explosive which has been used in terror attacks.

Police said a welder was stopped during a random security check at the facility. Plant spokesman Roger Bergman said a second suspect was arrested because “there is some uncertainty about who owns the bag.”
The full story is available here. This could be nothing, but if it’s not nothing, it would be a very big deal.