Gas pistols, pepper spray and other items used in self-defence are in high demand in Germany, following the sexual assaults in Cologne and other parts of the country on New Year's Eve.

The revelation that migrants from north Africa were behind many of the attacks has caused consternation in a country which, since the atrocities of Nazism, has been largely sensitive to the plight of minorities and about the use of weapons.

Europe editor Katya Adler reports from Berlin on the changing mood in Germany.