State investigators hauled in over 3,700 bags of heroin Tuesday after busting two Holyoke drug suspects.

The drug bust followed a lengthy investigation by the Massachusetts State Police and the Hampden County Narcotics Task Force hauled in over 3,700 bags of heroin after busting two Holyoke men on Tuesday.

Julio Rosado, 20, was charged with two counts of Trafficking Heroin/Morphine/Opium, and two counts of Distribution of a Class A substance.

Vega Armando, 27, was charged with Possession with Intent to Distribute a Class A substance (heroin), Possession to Distribute a Class B substance (oxycodone), and Trafficking Heroin/Morphine/Opium.

Rosado is being held on $25,000 bail and Vega is being held on $540 bail and will be arraigned in Holyoke District Court.