TMZ, which claims to have obtained a copy of the autopsy report, says the actor suffered from plethora of internal infections when he died in his 60s.
The reasons of his death include heart valve infection, Coronary artery disease and pneumonia. Brain disorder caused by drug over dose and septic emboli are also cited as other reasons for his death.
The 60-year-old had struggled for life for over a decade and was admitted to hospital on May 10 in an unconscious state. Jeff died when his family finally decided to take off the life support machine.