> "It is not Sweden's task to continue this investigation." > Ljungqvist said the main task had been to establish whether Sweden or Swedish citizens were invol

> "It is not Sweden's task to continue this investigation." > Ljungqvist said the main task had been to establish whether Sweden or Swedish citizens were involved in the attack, which he said had taken place in international waters. > "The answer to that question is 'no' and there is nothing in this case that poses any risk to Sweden's security now that we have seen how things stand," he said.