As children are spending more time on the internet with schools closed, police are urging parents and carers to talk about the dangers of falling victim to abuse.
Cambridgeshire Police want them to "have conversations about internet safety", to protect them from grooming.
Det Ch Insp Andrea Warren said: "We need parents and carers to take an interest in what their children are doing online and have important conversations about what is safe and appropriate.
“A key question to ask yourself is: Do I know the person my child is communicating with? If not, then this could be cause for concern and act as a warning sign."