A teenager from Essex has been charged with encouraging others to get involved in the recent riots using Blackberry Messenger.

Under the Serious Crime Act 2007, the unnamed 18-year-old from Clacton was accused of encouraging or assisting offences.

She is alleged to have sent a BBM message to friends last Monday (August 8) telling them to copy the violence and looting that was happening across England.

The teenager is on bail and will appeal at Colchester Magistrates’ Court in September 1.

Yesterday a 27-year-old man from Southampton was also charged with inciting violence via BBM.

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BBM is a cross between texting and social networks like Twitter, allowing users to send private messages and broadcast messages to many users.

On Monday Canadian company Research in Motion (RIM), manufacturers of BBM, said it would help investigators “in any way we can”.

Both Labour and Tory MPs called for BBM to be shut down while the rioting was at its worst.

Yesterday Prime Minister David Cameron said: "We are working with the police, the intelligence services and industry to look at whether it would be right to stop people communicating via these websites and services when we know they are plotting violence, disorder and criminality.”