Officers in Cumbria are warning parents to be alert to signs of internet bullying over the summer holidays and to learn more about what their children are doing online.
Online threats are the biggest risk, but the police are also concerned about an increase in teenagers texting pornographic images.
The warning came as the Prime Minister said Britain had to do more to protect childhood innocence.
Dan Ashby reports:
More top news
Trail hunting, where a scent is laid for hounds and the hunt to follow, has been widely practised since the 2005 ban on fox hunting.
Dangerous chemicals stored in a laboratory at the nuclear reprocessing plant have now been detonated by an army bomb disposal team.
Explosives experts were called to the nuclear reprocessing site in Cumbria, to help deal with chemical substances.