RAPID CITY - A state trooper scored a major marijuana bust Wednesday during a traffic stop on Interstate 90 about 8 miles east of Rapid City.

The lawman's drug dog sniffed out 35 pounds of pot in the spare tire, and three people were arrested. Two of them are from Louisiana, and one is from Colorado.

The arrests led to a second discovery of pot in another pickup, which was parked at a Rapid City motel. After getting a search warrant, officers found 34 pounds of pot in the second truck - also in the spare tire - and arrested two more people from Louisiana.