The medical examiner's office told NewsChannel 4 that an autopsy on actor Heath Ledger was inconclusive, and more tests are needed.

Additional toxicology tests will be conducted and results are not expected back for another seven to 10 days, according to the medical examiner's office.

Ledger was found by his housekeeper, who was trying to let him know that a masseuse had arrived for an appointment, police said. The housekeeper found him dead, face down and naked at 3:26 p.m.

Police sources said investigators found two bottles of sleeping and anti-anxiety pills at the apartment -- one prescription, one over the counter.

Fire officials told NewsChannel 4 that a 911 caller reported that a man was not breathing and his body was "cold"

[wnbc]