The DEA is warning that a new deadly drug 100 times more powerful than fentanyl was discovered in Long Island during a narcotics raid last month — and could already be in the streets for sale.

A new form of nitazene — a deadly synthetic opioid that is Narcan-resistant and already causing a wave of overdose deaths throughout the country — was seized by agents during a Hicksville raid in August and was discovered for the first time in the Northeast, the agency revealed.

“It’s alarming. We haven’t come across this compound anywhere in the entire Northeast,” Special Agent Frank Tarentino said of the new type of nitazene. 3

Anthony Gianatiempo, 34, of Hicksville, was arrested after agents and Nassau detectives raided his home on Aug. 5 — seizing a pack of counterfeit oxycodone “M30

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