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PHILADELPHIA (CBS) — The Philadelphia district attorney announced Thursday a major drug bust in Kensington.

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Larry Krasner said 57 suspects were arrested for allegedly selling fentanyl, heroin, cocaine and other drugs that brought in nearly $5 million in annual revenue.

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Among those arrested were individuals accused of controlling the drug enterprise known as the Alameda Drug Trafficking Organization.

Alleged street dealers were also arrested.

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The investigation focused on the intersection of Kip and Cambria Streets, an area known as one of the most dangerous parts of the city.