Los Angeles - Two days after the death of pop star Michael Jackson, the singer's family remains unable to contact his private doctor to learn about Jackson's final hours.

Civil rights activist Jesse Jackson, a friend of the family, told broadcaster CNN on Saturday that relatives are growing increasingly upset because they remain unable to contact Conrad Robert Murray, Jackson's private doctor.

The cardiologist has not been accessible since leaving Jackson's home after the singer's death. Murray regularly accompanied Jackson and tried to resuscitate Jackson after the singer collapsed in his Los Angeles home on Thursday.

An autopsy has shown no foul play suspected in Jackson's death and police say Murray is not a suspect. It is unclear if he has been questioned. Murray's car was taken as evidence after Jackson's death. (dpa)