Correctional Services said that “matters are under control” at Johannesburg’s Sun City Prison on Wed.
Britney Spears, paranoid about safety after a batch of crazed fanmail, has beefed up security and enrolled in the kind of hardcore Israeli combat techniques Matt Damon uses in The Bourne Ultimatum .
The pop star is reported to be terrified someone is out to harm her and her young sons Sean Preston and Jayden James.
So now she's taking steps to ensure she can take care of herself.
A source close to Spears says: "She has beefed up security and, told them about the mail. She is doing her best to make a comeback, but she is terrified about the negative attention she is getting."
And now she's fighting fit after signing up for Krav Maga training. "She realises she does not have the stamina she used to, after having two kids. She is putting in overtime working out on strength training," the insider adds.
The fighting technique, which has been practised by the Israeli special forces for decades, has become one of Hollywood's trendiest martial arts in recent years.
Jennifer Lopez and Angelina Jolie have both recently studied Krav Maga for their roles in films such as Enough and Tomb Raider.
Fighters claim that as well as helping agility and toughness, Krav Maga helps raise self-esteem and mental awareness.
John Aldcroft, who teaches at London's British Academy of Krav Maga, says: "It's perfect for Britney because she obviously has a lot of aggression in her."- Wenn