German police are investigating an asylum-seeker on suspicion that he fought for the Islamic State group in Syria, newspaper Welt am Sonntag reported Sunday.
The suspect is a Syrian national and lives in an asylum-seeker shelter in the northeast region of Brandenburg, the newspaper reported, quoting security sources.
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The man had allegedly told other migrants living in the centre that he had fought for the IS group and killed people.
But his claims were filmed secretly with a mobile telephone by other residents of the shelter, leading to the probe.
Investigators are now trying to determine if the Syrian was indeed a member of the IS, the newspaper reported.
Despite the case, federal police do not believe that Islamists are infiltrating Germany through the influx of refugees.