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Update: Katherine Jackson has been granted temporary guardianship of the three kids. A hearing is set for next Monday.
As we reported earlier, the Jackson family plans to fight for custody for Michael Jackson's three children, Paris, Prince and Blanket.
Now Michael's mom, Katherine Jackson, has filed a guardianship petition, asking the court to appoint her as the guardian of the children.
The petition states that while the kids have "no relationship with their biological mother," they have a "long established relationship" with Katherine, their grandmother.
Earlier today an interview claimed that Debbie Rowe -- the biological mother of Paris and Blanket -- said that Michael Jackson is not the biological father of his children. Debbie's attorney has since said that the interview was a fake.
Still, Katherine's petition says that it is "not known at this time" whether or not Debbie agrees that Katherine should become the children's legal guardian.
Think the court battle for custody could get as heated as what went down between Larry Birkhead and Howard K. Stern following Anna Nicole Smith's death?