SIOUX FALLS, S.D. (AP) — Authorities in Sioux Falls say a casino was robbed at knifepoint early Saturday. Police say the suspect, wearing a face covering and sunglasses, entered Fireside Casino on South Carolyn Avenue about 7:30 a.m. Saturday and threatened the employee. He drove off with an undisclosed amount of cash in the employee's white minivan. There were no injuries and the robbery remains under investigation.