RAPID CITY, S.D. (AP) — Rapid City police say they've made two large drug busts on buses traveling through the city, thanks to alert drivers.

Authorities say drivers on Wednesday and on Nov. 25 contacted them after smelling marijuana.

Officers on Wednesday seized a pound of pot along with methamphetamine, and a passenger from Missouri was arrested later in the day in Mitchell.

In the earlier incident, officers uncovered more than 7 pounds of marijuana in an overhead compartment. Police are still trying to determine who it belonged to. They arrested a passenger from Minnesota after finding a smaller amount of pot in his suitcase.

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