The cause of death has not yet been determined, but a law enforcement official tells ABC News heroin was found at the scene and a hypodermic needle was sticking out of Hoffman's arm. The New York Police Department is continuing to investigate.
Results from the NYC Office of Chief Medical Examiner on the exact cause of death are expected on Monday.
Hoffman's family released the following statement on the actor's untimely death this afternoon:
See more US News from ABC|ABC World News