LOS ANGELES: Michael Jackson's personal doctor, who was with the singer when he died, is being interviewed as the coroner defers the cause of death for further tests.
Dr Conrad Murray and his car being seized by Los Angeles police.
Meanwhile, the Los Angeles coroner's office has said a three-and-a-half hour post mortem showed no external injuries or evidence of foul play but deferred cause of death for further tests.
Spokesman Craig Harvey said exhaustive toxicology tests will take "approximately four to six weeks to complete".
Jackson's body has now been removed from the coroner's office and taken to an unknown location.
No funeral plans have been announced but his family say they have not ruled out a public service.
LA Police Department assistant police chief Charlie Beck said the further tests would provide "key results that will steer the direction of the investigation".
"We are still trying to determine whether prescription drugs were involved," Mr Beck said at a news conference.