Three people have been arrested this week on drug charges. The St. Clair County Sheriff Drug Task Force worked two investigations which saw the arrest of a 49-year-old Port Huron man Monday evening following a search warrant that was executed in the 1800 block of 23rd Street in Port Huron. Officers seized about $4,000 of crack cocaine, 12 marijuana plants, $271 in cash, two flat screen TVs, a Honda scooter, a 2007 Pontiac Grand Prix and a computer. Charges of possession of cocaine with intent to deliver, manufacture/delivery of marijuana and operating a drug house are expected. Last evening a search warrant was served in the 3400 block of Cherry Street in Port Huron where a 28-year-old Port Huron man and a 26-year-old Port Huron woman were arrested and are expected to be charged with possession of cocaine with intent to deliver and operating a drug house. The man will be charged as a habitual offender.