Six different types of prescription drugs were found in "Brokeback Mountain" actor Heath Ledger's apartment -- including anti-anxiety medications and sleeping pills, media reported Thursday. 

An autopsy on the 28-year-old actor was inconclusive and that more would be known in about 10 days, when more tests were completed, according to the medical examiner's office.

Among the prescription medications found were pills to treat insomnia and anxiety, and an antihistamine, according to two law enforcement officials. Three of the drugs were prescribed in Europe.

A rolled-up 20-US-dollar bill was also found on the floor near Ledger's bed. New York Police Department spokesman Paul Browne said lab tests found no visible drug residue on it and nothing to indicate it had been used to snort drugs.

The Australian-born actor was found dead Tuesday in his apartment by his housekeeper and a massage therapist.

Police said Ledger probably died Tuesday between 1 p.m. and 2:45 p.m. At 1 p.m., the housekeeper went into his bedroom to change a light bulb, saw him sleeping and heard him snoring.

At 2:45 p.m., the massage therapist showed up for Ledger's appointment, knocked on his door and got no answer. She later noticed Ledger-- lying naked and face-down on his bed -- was unconscious and called actress Mary-Kate Olsen, whose number was programmed into Ledger's cell phone, to seek advice.

Olsen said she would send over her private security. In the ensuing moments, the massage therapist realized that Ledger might be dead, and called 911. Paramedics -- and Olsen's security people -- arrived minutes later.

Ledger was recently seen in the Bob Dylan biopic "I'm Not There." He had recently finished filming a turn as the Joker in "The Dark Knight," a sequel to 2005's "Batman Begins." 

Ledger spilt with his girlfriend, actress Michelle Williams last year and they have a 2-year-old daughter Matilda.

(Xinhua/Agencies January 24, 2008)