FARGO, N.D. — Authorities in West Fargo, Fargo and neighboring Moorhead, Minn., are investigating a string of armed robberies.

The Forum newspaper reports that there have been four armed robberies in the area in less than a month, and three within the past week.

The latest was Tuesday night, when an employee at a Stop-N-Go store in Fargo reported that four men demanded money, and that one of them had a gun.

Other recent robberies have occurred at Stop-N-Go stores in West Fargo and Moorhead, and at a bank in Fargo.