A public memorial service for Michael Jackson is planned for Tuesday in Los Angeles, but it's unclear who will pay for it, city officials say.

The 10 a.m. ceremony, held in the downtown arena where Jackson had his final rehearsal, will need a massive law enforcement deployment with thousands of officers, city leaders told The Los Angeles Times.

There also was concern whether police would have time to plan for an event of that scale particularly since many officers also would be working overtime during the Fourth of July weekend.

A Friday news conference was called to explain how to get the 11,000 free tickets. Reports indicated 1 million more fans could gather outside.

Meanwhile, an attorney for Debbie Rowe, the mother of Jackson's two elder children, said she had not decided whether to seek custody, despite telling a television reporter that was her intention.