Early Saturday morning, just before 5, police say an armed man brandished a gun as he entered the Circle K on Riverside Drive.
He left with an undisclosed amount of money and was last seen heading in the direction of the Applebee's on Pierce Avenue.
The clerk said the robber wore a ski mask, black leather jacket, black pants and black shoes.
Anyone with information about this robbery is urged to contact MPD at 751-7500 or Crimestoppers at 877-68-Crime