A temporary guardianship was granted to Katherine Jackson. A hearing will be held July 6th

[Updated at 11:05 a.m.]: A Los Angeles County Superior Court judge issued a ruling this morning granting temporary guardianship of deceased singer Michael Jackson's three children to his mother, Katherine Jackson, a court spokesman said.

Judge Mitchell Beckloff has set a hearing for July 6 at 8:30 a.m. for the case, where the children do not have to be present, according to Allan Parachini, spokesman for the Los Angeles Superior Court. The hearing was originally scheduled for Aug. 3. Parachini said the rescheduling is routine for guardianship cases.]

Michael Jackson's mother had filed documents this morning in Los Angeles County Superior Court, seeking guardianship of the deceased pop singer's three children.

Attorneys for Katherine Jackson said in court papers that the children's biological mother, Debbie Rowe, does not have a relationship with them and that if she won custody, it would be "detrimental" to the minors.

Prince Michael Jr., 12, Paris Michael Katherine, 11, and Prince Michael II, 7, are living with their grandmother and their grandfather, Joe Jackson, and have a "long established relationship" with her, the filing stated.

The filing, by Encino-based attorney Diane Goodman, is the first legal volley in what is anticipated to be a protracted battle over custody of the children and control of his estate.

Some legal experts believe the pop star's former wife, Debbie Rowe, is most likely to receive final custody of the two elder children she had with the singer.

Rowe initially waived her parental rights. But she later changed her mind, and an appeals court ruled that she was the legal mother of the children.

Prince Michael II was conceived by a surrogate mother, who could claim custody of him.

Attorney L. Londell McMillan, who told CNN on Sunday that he was the Jackson family lawyer, could not immediately be reached for comment. His name was not mentioned in the filing.