Sweden's Prime Minister Stefan Löfven on Thursday admitted his country has been “naive” about the possibility of an Islamic State (ISIS) terror attack, adding Sweden would be stepping up security measures.

"Perhaps it's been hard for us to accept that in the middle of our open, democratic society there are people sympathizing with the ISIL killers," he was quoted by The Local news website as having told journalists at a press conference in Stockholm, using another acronym for ISIS.


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