FARGO (KFGO-AM) -- A reported armed robbery at a Fargo convenice store turned out to be a misunderstanding. Police were called to Casey's General store near the Fargodome just after 11 p.m. Thursday. Someone in the parking lot called 911 to report an armed robbery inside the store. Multiple squad cars responded. Officers soon learned it wasn't a robbery, but rather employees who wear wearing halloween costumes.