Academy Award-winning actor Philip Seymour Hoffman, who won an Oscar for the film "Capote," was found dead in his New York City apartment on Sunday of an apparent drug overdose, a New York Police Department source said.

Photo by Dominique Charriau/WireImage

The source said Hoffman, 46, was found dead after a friend of the actor placed a 911 emergency call. The source gave no further details but the New York Times, citing a law enforcement official, said investigators found a syringe in Hoffman's arm and an envelope containing what was believed to be heroin.

Born in upstate New York, Hoffman won an Academy Award for the 2005 biographical film "Capote," in which he played writer Truman Capote. He also received three Academy Award nominations as best supporting actor, for "The Master" in 2013, "Doubt" in 2009 and "Charlie Wilson's War" in 2008.

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Hoffman burst onto the film scene after more than a dozen earlier roles, in 1997's "Boogie Nights," in which he played a lovelorn gay man in the movie about the porn industry.

While he appeared in blockbusters such as "Twister" and "The Hunger Games" series, Hoffman was more associated with the independent film world for his intense portrayals of often disturbing and complex characters in such films as "Happiness," in which he played an obscene phone caller, and "Before the Devil Knows You're Dead."

In the latter film he played a son who schemes to rob his parents' jewelry store, resulting in their deaths. But Hoffman could also play nice, as in "Magnolia," in which he played the role of an angelic nurse.

Hoffman spoke in the past of struggling with drugs, including a 2006 interview in which he told CBS he had abused "anything I could get my hands on. I liked it all."

(Reporting by Chris Francescani, Angela Moon and Chris Michaud; Editing by Meredith Mazzilli, Cynthia Johnston and Dan Grebler)