The feud that has pitted Michael Jackson's mother and children against his siblings has intensified, with police being called to break up an altercation at their home.
Randy Jackson said he and his brother Jermaine and sister Janet went to the house in Calabasas that is shared by Michael's children Prince, Paris and Blanket Jackson, and their grandmother Katherine.
Katherine Jackson is said to be "resting under doctor's orders" with her daughter Rebbie in Arizona, and Paris Jackson is furious she has not been able to contact her grandmother.
But Randy Jackson said he went to the Calabasas property in LA County to invite Paris and Prince to join their grandmother in Arizona.
Sandra Ribera, one of Katherine Jackson's lawyers, said authorities were called after the singer's children were accosted by relatives who followed them into their gated community.
"After exiting their vehicles, Jackson family members ran up to Michael's children as they yelled and began to aggressively grab at the cellphones in their hands," Ribera said.
She said a "plan has been in place for the last three years to remove Katherine Jackson from her home and her beloved grandchildren".
Sheriff's spokesman Steve Whitmore said deputies were continuing to investigate the altercation that took place, but he said there were no indications it involved the singer's children.
He said the incident involved two adult males, but declined to identify them further.
A battery case may be presented to prosecutors, but Whitmore said that decision had not yet been made.
John Branca and John McClain, the executors of Michael Jackson's will, wrote a letter that was posted on fan sites hours after the disturbance at the hill-top house.
"We are concerned that we do what we can to protect them from undue influences, bullying, greed and other unfortunate circumstances," they said.
But Randy Jackson accused Branca and McClain of criminal misconduct, and claimed his brother's 2002 will was a fake.
"They know that they've been caught, they know that they've falsified a document and they know that there are questions that we want answered," Randy Jackson told the Reverend Al Sharpton's MSNBC cable TV show.
"This family is united to right a wrong."
Jackson's estate has denied all claims of wrongdoing, calling questions about the will and allegations against the executors "false and defamatory accusations".
The executors hinted that further action might be taken to protect the singer's children.