Sexting 'can get really out of hand'
Police are visiting every school in Wales to warn pupils of the dangers of "sexting".
As well as cutting down on cyberbullying, there are fears young people do not know they could be breaking the law by sending sexual images.
It comes as Safer Internet Day is highlighting online safety.
A new survey found 30% of 11-16-year-olds experienced unkind online behaviour in the last year.
PC Richard Norris brought his message to a school in Swansea, where many pupils were surprised sexting was against the law.