MANITOWOC, Wis. (AP) — Police say employees of a Manitowoc business were tied up and ordered into a storeroom by two robbers, one of whom was armed.

The business was robbed about 9 p.m. Sunday. Authorities say an undisclosed number of workers had their wrists and ankles bound in a back storeroom. Police say the two male robbers fled with cash and items from the business.

A customer had come into the store and found the employees and helped free them.

One suspect is described as a black man in his late 20’s to mid 30’s, around 5’6-5’8 tall, with black hair.

The other suspect is described as black man, 5’4 tall with black hair.

Police declined to name the business.

A news conference is set for for 1 p.m.