Actor Heath Ledger has been found dead at a New York City apartment.

The Brokeback Mountain star was discovered unconscious at his apartment in SoHo in downtown Manhattan at around 15:30 local time (20:30 GMT).

Though the cause of death has not yet been established, police are reportedly investigating the possibility that the 28-year-old had died of a drug overdose.

Ledger had been due to have a massage at the Broome Street apartment when his housekeeper discovered him dead on Tuesday afternoon.

"He was found unconscious at the apartment and pronounced dead," police spokeswoman Paul Browne said.

"We are investigating the possibility of an overdose," he told the Reuters news agency.

"There were pills within the vicinity of the bed."

The Perth-born actor received an Oscar nomination for his role in Ang Lee's Brokeback Mountain in 2005 but Philip Seymour Hoffman took the award for his acclaimed role in Capote.

Ledger met his partner, Dawson's Creek actress Michelle Williams, on the set of Brokeback Mountain, with whom he had a daughter, Matilda.

The couple separated in September last year.

Ledger starred in I'm Not There, as one of several actors representing Bob Dylan, and had recently completed production on his role as the Joker in the upcoming Batman movie The Dark Knight.

23/01/2008 07:44:49