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OTRC: Philip Seymour Hoffman dies at age 46, heroin found at scene (Update)

Philip Seymour Hoffman appears at a screening for 'God's Pocket' at the 2014 Sundance Film Festival in Park City, Utah on Jan. 17, 2014. The Oscar winner was found dead in a New York City apartment on Sunday, Feb. 2, 2014. He was 46. (Seth Browarnik / Startraksphoto.com)

Oscar-winning actor Philip Seymour Hoffman was found dead at his New York City apartment Sunday afternoon at age 46.

His body was found in his bathroom and a hypodermic needle was sticking out of his arm, while evidence of heroin was found at the scene, police sources told ABC News. They said the actor appears to have died from an overdose, while authorities are still investigating the official cause of death. Hoffman reportedly underwent treatment for heroin abuse last year.

Screenwriter David Katz and a friend found Hoffman lying motionless in his apartment at 11:15 a.m. ET and called 911. Emergency workers arrived and found Hoffman unconscious and unresponsive, lying on the bathroom floor and pronounced him dead at the scene, an NYPD statement said.

Emergency workers pronounced Hoffman dead at the scene. Police are continuing to investigate the matter, police added, saying: "The Medical Examiner's Office will determine the cause of death. Family has been notified."

There was no evidence of criminality. Hoffman is survived by girlfriend Mimi O'Donnell and their son and two daughters.

Philip Seymour Hoffman's family releases statement, celebrities mourn actor

"We are devastated by the loss of our beloved Phil and appreciate the outpouring of love and support we have received from everyone," the actor's family said in a statement. This is a tragic and sudden loss and we ask that you respect our privacy during this time of grieving. Please keep Phil in your thoughts and prayers."

The actor was mourned online by the likes of Jim Carrey and Val Kilmer. Check out reactions from celebrities to Philip Seymour Hoffman's death.

Philip Seymour Hoffman's past addictions

The actor reportedly underwent treatment for addictions to heroin and prescription drugs last year. Hoffman spent 10 days in a detox facility, E! News said on May 31, following a report by TMZ.

E! News reported that the actor, a father of three, began to get addicted to prescription pills in 2012 and then snorted heroin for about a week, after which he entered a detox facility on the East Coast.

Hoffman had said on the CBS show "60 Minutes" in 2006 that he battled addictions to drugs and alcohol when he was a teenager. After undergoing rehab at age 22, he then became sober.

Hoffman won an Oscar for his leading role in the 2005 film "Capote." He has also been nominated for his performances in the movies "The Master", "Charlie Wilson's War" and "Doubt" and has also appeared in films such as "The Big Lebowski" and "Almost Famous."

He starred in the "Hunger Games" films, playing Plutarch Heavensbee. He recently and reprised his role in the third and fourth movies in the series, the two-part "Mockingjay."

ABC News contributed to this report.

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