Janet, Randy and Rebbie Jackson say the executors of Michael Jackson's will are causing harm by damaging "fundamental family relationships" and isolating matriarch

The Jackson siblings released a statement late Friday through an attorney amid a fight over their brother's will with the executors of his estate.

Janet, Randy and Rebbie Jackson accuse the executors of a "relentless" negative media campaign. They say they plan to maintain their challenge and insist they're not motivated by money.

On Thursday a judge named TJ Jackson, a cousin to Michael Jackson's three children, as co-guardian with Katherine Jackson, who was named their sole caretaker in the disputed will.