(Yahoo!) - Authorities investigating the death of actor Philip Seymour Hoffman report that they found more than more than 50 glassine-type bags containing what they believe to be heroin in his New York City apartment on Sunday.

Investigators also found several bottles of prescription drugs and more than 20 used syringes in a plastic cup, CNN reports.

The bagged substances, which were marked with "Ace of Hearts" and "Ace of Spades," could have been laced with Fentanyl, an opiate that has been blamed for several deaths in the Northeast recently. Police are reportedly investigating whether Hoffman received a laced dose of heroin, which lead to his death.

"Dozens of individuals in the Philadelphia, Chicago, St. Louis, and Detroit areas have overdosed on a combination of heroin (or cocaine) and fentanyl, a narcotic analgesic that is 50 to 100 times more potent than morphine - and some have died. A powerful opiate pain reliever typically used after surgery or to treat patients with severe pain, fentanyl, like many prescription medications, can be deadly when abused," says the National Institute of Drug Abuse.

On Monday, NYPD reportedly launched an extensive investigation to track down Hoffman's dealer. An eyewitness allegedly told police investigators that he believed he saw Hoffman withdrawing a large sum of money from a bank ATM on Saturday night in the West Village and meeting with two men.  

Despite the bevy of drug paraphernalia found inside Hoffman's apartment, those who saw the Oscar-winning actor in the final days leading up to his death reported that nothing seemed amiss.


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