The Jackson family were understood to have requested a second independent post-mortem examination on Michael Jackson's body.
Brian Elias, lieutenant at Los Angeles County Department of Coroner, said: 'My understanding is that they have requested a second autopsy. But we have no way of confirming that.
'The body is in a mortuary and if they want to proceed with a separate autopsy, it is up to them.'
The first official examination was completed yesterday and the body released to the family.
Family friend the Rev Jesse Jackson is reported to have encouraged the family lawyer to press for the Jacksons to order their own tests.
The Jackson family have gathered at their home in Encino, Los Angeles, to discuss funeral arrangements and care for his three children.
They are reported to be searching for answers about the singer's last days amid reports that he received a shot of the powerful painkiller Demerol shortly before his death and claims he was regularly taking a cocktail of prescription drugs.
A family friend said the Jacksons wanted to know more about the role AEG, the promoters of the singer's planned UK concerts at London's O2 Arena, was playing in his life before his death.
The family are also waiting for answers from Dr Conrad Murray, Jackson's personal physician who was with him when he died.
Police are still waiting to question the doctor further and have seized his car from outside Jackson's house in case it contained drugs or other evidence.
Entertainment news TMZ tonight reported that police also want to talk to a second medical adviser, Dr Tohme R Tohme, who met the singer in Bahrain and is reported to have accompanied him to hospital after he fell ill on Thursday.
The results of the post-mortem examination were deferred, possibly for between four and six weeks.
Charlie Beck, assistant police chief of the Los Angeles Police Department, said it was 'way too early' to draw any conclusions about the singer's death.
Craig Harvey, operations chief of the Los Angeles County Coroner's office, said there was no evidence of foul play or trauma on the superstar's body but further tests were needed.
He said he could not comment on any specific drugs that Mr Jackson may have been prescribed, but added: 'We know he was taking some prescription medications.'
He said: 'There was no indication of any external trauma or any indication of foul play on the body of Mr Jackson.'
The post-mortem examination took about three hours.
