The Cass County Sheriff’s Department is investigating an armed robbery which occurred Monday evening at a home on White Temple Road in Penn Township. The victim said he walked in on two suspects during a home invasion. One of the suspects reportedly pointed a gun at the victim and tied him up. A number of items were stolen. The victim described the suspects as two black males in their late teens or early twenties. It appears three suspects were involved in the crime. The victim was not injured.