Four arrests were made by the St. Clair County Sheriff’s Drug Task Force K-9 Unit, during a narcotics investigation earlier this week on I-94 near Meisner Road in Casco Township resulting from a traffic stop. Arrested were two men, 36 and 60 years of age and two women, 39 and 31 years old, all four, Port Huron residents. Seized in the bust was heroin with the approximate value of $2850, the vehicle and U.S. currency. Charges are expected to include possession of heroin with intent to deliver; maintaining a drug vehicle; frequenting a drug vehicle and habitual offender. All four suspects were lodged in the St. Clair County Jail.