Other cities, including Pittsburgh, Reading and Eerie, have also seen a steady increase in drug abuse cases. Local law enforcement agencies believe drugs transported around Pittsburgh are kept within the state and sold to nearby retail distributors. The primary risks for Reading are wholesale quantities of marijuana, and smaller amounts of cocaine and heroin that pass through the city on the way to eastern Pennsylvania. Erie, on the other hand, involves international smugglers who transport drugs from Canada into the . Drugs, primarily marijuana products, are often moved using airdrops and cigarette boats across Lake Erie.