The head of Sweden's intelligence service SAPO says police are searching for a man who is wanted in connection with a terror probe.
Anders Thornberg said Wednesday that police have launched "a preliminary investigation regarding preparation for a terrorist offense."
He said the Swedish case was not linked to the Paris attacks.
He said the suspect had entered Sweden this week, but declined to give any further details about the person.
The agency said earlier Wednesday it has raised the Scandinavian country's terror alert to the second-highest level after it received "concrete information."