(COLUMBUS TOWNSHIP) -- An extensive investigation into heroin and cocaine sales in the Port Huron area resulted in the arrest of three men late Monday during a traffic stop on I-94 and Fred Moore Highway in St. Clair County's Columbus Township. Drug Task Force officers seized $1,600 worth of heroin, $400 in crack cocaine, marijuana, analog drugs, and a loaded .45 caliber semi automatic handgun from the vehicle. Two Detroit men ages 23 and 25 and a 35-year old Port Huron area man were arrested at the scene. Officers say all three suspects have felony drug convictions on their record and one is on federal parole. The three men remain jailed on several drug-related charges.