Movie and TV actor David Carradine, best known for his leading role of Kwai Chang Caine on TV's Kung Fu in the 1970s, died Wednesday in Bangkok, where he was shooting a film, his manager confirmed Thursday. The star was 72.

The Web site of the Thai newspaper The Nation cited unidentified police sources as saying Carradine was found Thursday hanged in his luxury hotel room.

It said Carradine was in Bangkok to shoot a movie and had been staying at the hotel since Tuesday.

The newspaper said Carradine could not be contacted after he failed to appear for a meal with the rest of the film crew on Wednesday, and that his body was found by a hotel maid at 10 a.m. Thursday morning. The name of the movie was not immediately available.

It said a preliminary police investigation found that he had hanged himself with a cord used with the room's curtains. It cited police as saying he had been dead at least 12 hours and there was no sign that he had been assaulted.

Police are speculating that accidental suffocation, not suicide, may have caused the death of American cult actor David Carradine, whose body was found in a hotel closet in the Thai capital with a rope tied to his neck, wrist and genitals.

Celebrity blogs and social networking Web sites were abuzz with news of the death of Carradine _ best known for the 1970s TV series "Kung Fu." The circumstances under which he died have led to speculation that the 72-year-old actor may have been engaged in a dangerous form of sex play known as auto-erotic asphyxiation.

The practice involves temporarily cutting off the supply of oxygen to the brain to heighten the effects of a sexual climax.

Carradine was a leading member of a venerable Hollywood acting family that included his father, character actor John Carradine, and brother Keith.

In all, he appeared in more than 100 feature films with such directors as Martin Scorsese, Ingmar Bergman and Hal Ashby.

He reprised the role in a mid-1980s TV movie and played Caine's grandson in the 1990s syndicated series "Kung Fu: The Legend Continues."

He returned to the top in recent years as the title character in Quentin Tarantino's two-part saga "Kill Bill."

Married five times and divorced four – he is survived by his widow, Annie Bierman, whom he married in 2004 – Carradine starred as folk singer Woody Guthrie in the 1976 Best Picture Oscar nominee Bound for Glory. Among his later screen roles was in Quentin Tarantino's Kill Bill, in which he played Bill.

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