The Swiss city of Lucerne is to launch a poster campaign telling migrants not to harass women ahead of its annual carnival parades.

Following the mass sex assaults in the German city of Cologne on New Year's Eve, concern has been growing across Europe of a repeat performance at any future mass gatherings and celebrations.

Now Lucerne, in central Switzerland, is looking to inspiration from Austria in educating migrants in how to behave around Western women after concerned citizens began writing to authorities about next month's carnival.

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