More than 1000 people in Denmark, mostly teenagers, face preliminary charges of distributing child pornography after sharing videos and photos on social media.
Police say the material - featuring two 15-year-olds having sex - could constitute distribution of child pornography even though 15 is the age of consent in Denmark.
Police spokesman Flemming Kjaerside says "young people know it can have huge consequences" to share such material, although he acknowledged they may not know it is a crime.
So far 1,004 people across Denmark face preliminary charges - a step short of formal charges. If found guilty, they face fines, jail or they can be banned from working with children for a decade.
Two videos and photos were shared through Facebook's Messenger chat-platform last autumn.
