Two Norfolk schools have raised the alarm over a video chat and messaging app after fears were raised about online predators.

Diss High School and IES Breckland Free School, in Brandon, have both warned parents about social media site, ooVoo after a warning from Norfolk Police.

In a statement on its Facebook page, prompted by warnings from Diss High School, IES Breckland said: 'Some students may be part of an online forum called ooVoo, this forum allows instant messaging and group video chats for up to 12 people.

'While the use of this forum may be innocent it is completely unfiltered and anyone who has an account can make contact with a child by sending an unidentified video call.

'Norfolk Police have advised that there are known sexual predators using this site and that they along with many other police forces in the area are monitoring this site closely.'

A Norfolk Police spokeswoman said: 'Internet safety is high on the agenda for the police and we do all we can to help create a safer online environment for young people and all internet users.

'So many young people have ready access to electronic gadgets and parents need to have important conversations with their children about who they may be chatting to online and what they may be sharing about themselves.

'Children do not need to be discouraged from using social networking sites but we can help teach them about protecting their personal information and themselves.'