LOS ANGELES - Michael Jackson's death certificate has been released without a listed cause of death and a coroner said investigators are still testing the singer's brain.

Public health officials issued the death certificate on Tuesday, the same day public and private memorials were held in Los Angeles. The cause of death is listed as `deferred.'

Assistant Chief Coroner Ed Winter said Jackson's brain, or at least part of it, was still being held by investigators and would be returned to the family for interment once neuropathology tests were completed.

Winter said families sometimes delay burying a loved one until after the brain has been returned, but he had received no word from the Jackson family about their intentions.

Police and coroner's officials continue to probe what killed the 50-year-old singer on June 25.

On the certificate, Jackson's occupation is listed as a musician and the information provided for the document was given by Jackson's sister, La Toya, one of several family members who rushed to the hospital where Jackson was pronounced dead.