It's Just Sad

Now I'm really going to cry during Brokeback Mountain and it'll be creepy to watch The Dark Knight.

Wednesday's autopsy to determine how Heath Ledger died has been called inconclusive. Additional tests and more time are required.

"The autopsy was inconclusive," New York City Medical Examiner spokeswoman Ellen Borakove tells PEOPLE. "We have to do further testing including toxicology and tissue testing. Neither cause of death or manner of death has been concluded. We expect additional results in 10 days to two weeks."

The 28-year-old star's body was found in the bedroom of his downtown New York City apartment, with prescription sleeping medication nearby.

Ledger had pneumonia at the time of his death, PEOPLE has confirmed.