Police in Lower Saxony have said that sporadic group sexual assaults have been reported at swimming pools in 2016, what they call a 'new phenomenon.'

Authorities came to the conclusion after comparing crime statistics between 2013 and 2016.

Police have said that "on occasion crimes have been registered in which the perpetrators have have acted from within larger groups," Die Welt reported on Friday.

These type of crime is "notable" because sexual crimes are usually "almost exclusively" committed by people acting alone.

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