SHEBOYGAN, WI (WHBL) - The Sheboygan County Sheriff’s Department is investigating a couple of armed robberies which occurred over the weekend. Sgt. Brad Jorsch said the first one occurred at a convenience store in Random Lake on Friday night. Then Marshall’s gas station in Cascade was hit Sunday night. Jorsch said it appears the same person was responsible. He said a gun was displayed in each of the holdups. The investigation is continuing.