Michael Jackson died on 25 June aged 50 AP

A PHARMACY in Las Vegas has been searched for documents relating to Michael Jackson's prescriptions, reports claim.

Agents from the Drugs Enforcement Administration (DEA) are looking for evidence relating to prescriptions written by Dr Conrad Murray as part of their probe into the singer's death.

It follows similar raids at Dr Murray's house and offices last month.

Police are reportedly working on the theory that the doctor administered the powerful sedative propofol shortly before the singer's heart stopped.

Jackson died aged 50 at his rented Beverly Hills home on June 25.

Dr Murray, his personal physician, was with his at the time of death. It has been suggested the medic administered a powerful drug to help Jackson sleep in the hours leading up to his death.

It is understood that during today's raid at Applied Pharmacy Services, DEA agents were looking for prescriptions written by Dr Murray for or Jackson under any aliases.

It is the latest in a number of warrants placed on premises connected to Dr Murray. His home and office in Las Vegas was raided last month, as was a site in Houston, Texas, connected to the doctor.

Dr Murray has been quizzed twice by police as part of their probe and a third interview is planned.

He has not been named as a suspect, but court records have identified the 51-year-old physician as the subject of a manslaughter investigation.

It is widely believed the results of Jackson's post-mortem examination will show the singer was on heavy medication when he died.

Yesterday, the Los Angeles County Coroner's Office said it had completed its autopsy on Jackson's body and related toxicology tests.

But the results will be delayed until after the official investigation is complete.

Los Angeles Police Department asked the office not to release any findings while its probe continues. Ed Winter, assistant chief coroner, declined to say when that would be.

He added that the office would not respond to queries until the inquiry is completed.