The results of an autopsy of Philip Seymour Hoffman's body were inconclusive, and more tests must be conducted to determine what caused his death, a spokeswoman for the New York City medical examiner's office said Wednesday.
There is no timetable for the undisclosed tests, spokeswoman Julie Bolcer said.
The body of the Oscar-winning actor, 46, was found Sunday on the bathroom floor of his New York apartment with a syringe in his left arm and bags of what appeared to be heroin inside the apartment. Those items were being tested. Police will only say the investigation is continuing.
Four people have been arrested in Manhattan and are being questioned in connection to potentially selling drugs to late actor Philip Seymour Hoffman, local media and the Associated Press are reporting.
Police raided a Chinatown apartment late Tuesday and took the suspects into custody, the Daily News reports. The four were arrested and taken into custody during the execution of a search warrant, Det. Brian Sessa of NYPD said. Drugs were found at the location, Sessa said. The New York Times reported that 350 bags of heroin were found.
Hoffman has three children - Cooper, 10, Tallulah 7, and Willa, 5 - with costume designer Mimi O'Donnell.
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