A Brooklyn man was charged after an undercover operation in which he tried to sell an undercover detective hundreds of bags of heroin, police said Sunday.

Officers from the Nassau-Suffolk Heroin Task Force, after an investigation, arranged a meeting with Jason Perez, 30, of Park Avenue, Brooklyn, to purchase the drug from him, a police news release said.

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Perez was arrested after he met the undercover detective at a prearranged location in Wantagh and tried to sell him the heroin, police said.

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Police said Perez had 390 bags of the drug with him.

The defendant is charged with criminal sale of a controlled substance in the third degree and criminal possession of a controlled substance in the third degree, police said.

At arraignment Sunday in First District Court in Hempstead, Perez was ordered held on bail set at $50,000 cash or bond.