RAPID CITY, S.D. (AP) — Police are investigating a weekend armed robbery in Rapid City in which a convenience store clerk was locked in a storage area.

Authorities say a gun-wielding man entered the Windmill Truck Stop about 4 a.m. Saturday, and forced the clerk into the storage area after having the clerk put money in a briefcase.

The robber got away with an undisclosed amount of cash.

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