Boston police arrested four suspects Monday and recovered two kilograms of methamphetamine and cocaine in connection with a drug investigation in Roslindale.

Officers were executing search warrants in the area of 24 Colgate Rd., according to a statement . The investigation was targeting Shyronn Johnson, 34, of Roslindale, who allegedly had a warrant issued out of West Roxbury District Court for failing to register as a sex offender.

Johnson was spotted exiting the apartment building, and a struggle ensued as officers arrested him, police said. After securing Johnson in handcuffs, they searched him and found a plastic bag of crack cocaine.

Police then searched the apartment, where they found and arrested Nicole Bilunas, 43, of Brockton; Hector Acevedo, 46, of Malden; and Wilgen Noble B

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