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Los Angeles Sheriff deputies were called to the home of Michael Jackson's mother Katherine on Monday after a physical altercation between family members that is being investigated as a possible battery.

Sheriff's spokesman Steve Whitmore tells the Associated Press that no arrests were made after deputies arrived around 1 p.m. to the Calabasas, CA residence where Katherine Jackson lives with Michael's three children Paris, Prince Michael and Blanket. Whitmore said deputies determined there was a physical altercation between two people and the case is being investigated as a possible battery.

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Whitmore did not specify which Jackson family members were involved in the altercation or whether the incident included Jackson's children. Katherine's lawyer, Sandra Ribera, told ET in a statement that the altercation occurred after "certain Jackson family members ambushed Katherine Jackson's home after their vehicle tore through security gates on the tails of the SUV containing Michael Jackson's children.

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Ribera's statement added: "After exiting their vehicles, Jackson family members ran up to Michael's children as they yelled and began to aggressively grab at the cell phones in their hands. Out of concern for the well-being of Prince, Paris, and Blanket Jackson, the children were forced to temporarily leave their home and taken to a safe location."

The statement also alleges a broader plan to oust Katherine from her home. "Following the incident, it was learned that one of the family members who was part of the ambush admitted that a plan has been in place for the last three years to remove Katherine Jackson from her home and her beloved grandchildren."

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The incident comes just days after a relative reported that Katherine Jackson was missing and was cut off from contact with Michael's children. Authorities eventually made contact with Katherine, who was staying with family members in Arizona, and they verified that she was safe.

Michael's 14-year-old daughter Paris expressed concern for her grandmother's whereabouts on Twitter over the weekend and posted another message on Tuesday stating that she had not had any contact with Katherine for more than a week. "9 days and counting… so help me god i will make whoever did this pay," she tweeted. 

Members of the Jackson family are engaged in an ongoing dispute over the validity of Michael Jackson's will -- which leaves everything in the pop star's lucrative estate to Katherine and his children. Five of Michael's siblings recently claimed that Michael's will was fake and they have demanded that the executors of his estate should resign.

A letter signed by Janet, Randy, Tito, Rebbie and Jermaine claims that Katherine, 82, is being manipulated by the executors, John Branca and John McClain, and that her health has suffered as a result. The estate denies the allegations, which first emerged shortly after Michael Jackson died in June 2009 from an overdose of a powerful anesthetic.