The accused supplied drugs in several cities of the department, particularly in the seaside resort of Punta del Este.
Following the investigation, which included surveillance of the suspects, police arrested a 36-year-old Colombian man with a criminal record.
The man had traveled to Argentina and was caught at the Maldonado bus terminal on his way back to the country with cocaine in a backpack.
His female partner, of the same nationality, was also arrested during a raid at his home.
Money, cocaine, methamphetamine pills and a pistol were seized at the scene.
The Colombian was sentenced to two years and 11 months and his partner to 11 months imprisonment for the crime of supplying narcotic substances.
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