UPDATE: 2/8/12 TMZ are now saying "Janet Jackson did not slap or verbally abuse Paris Jackson during a confrontation at the Jackson family home in Calabasas last week." They also backed down on claims that Janet called Paris a "spoiled little bitch."

Paris Jackson (l) and Janet Jackson (r). Photo: Getty Images

Jackson siblings Randy, Jermaine and Janet allegedly came to the home of Michael Jackson's children Paris, Prince and Blanket, with the intention of 'strong-arming' them to travel to Arizona to visit their grandmother, TMZ has reported.

It has been reported that the encounter quickly escalated into a violent row with Janet shouting at Paris "You're a spoiled little b***h!" and slapping her. Paris then reportedly slapped back and told Janet, "This is our house. Not the Jackson family house. Get the f**k out!"

Police attended the scene and while no arrests were made they say there is an active battery investigation underway.

Marlon, Tito, Jackie and Randy Jackson appear onstage with sister, singer Janet Jackson.

These extraordinary scenes followed bizarre claims over the weekend that the children's guardian, MJ's mother Katherine Jackson, had gone missing leaving the children unattended. Katherine was later found to be in Arizona with her daughter Rebbie and other family members.

As recently as yesterday Paris was still tweeting to protest her grandmother's absence, '9 days and counting… so help me god i will make whoever did this pay,' prompting rumours that MJ's siblings had kidnapped their mother.

Insiders say that at the heart of the whole strange affair is a dispute over the Michael Jackson estate, which has earned a reported $475 million since the singer's death. Five of MJ's siblings claim that the will, which leaves everything to his own children, was forged by two Hollywood lawyers. Last night Randy Jackson went on MSNBC to air his feelings and state the he feels 'there is criminal misconduct' in the handling of the estate.

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Executors of MJ's estate John Branca and John McClain wrote in a letter posted online to fans of the pop superstar that they were doing everything they can to protect his children.

"We are concerned that we do what we can to protect them from undue influences, bullying, greed, and other unfortunate circumstances," states the letter posted just hours after deputies responded to the disturbance at the home where Katherine and MJ's children live.

"While we do not have standing to directly intervene, we have monitored the situation and will continue to do so," wrote Branca, a lawyer, and McClain, a music executive. "We believe measures are being put in place that will help protect them from what they are having to deal with."

We have no doubt this will not be the last we hear of this superstar family and their dramatic family fight.