Migrants who are refused asylum are not always deported and could prove a threat to society, according to an MP who wants the Swiss government to address the issue in a report.

On Thursday the Swiss upper house of parliament backed a motion by Liberal-Radical Damian Müller in which he asked the Swiss government to examine the problem, reported news agencies.

According to the text of Müller's motion, some migrants are refused asylum but then manage to avoid being deported, including some who are criminal offenders or may have jihadist sympathies and therefore pose a terror threat.

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