Evanston police say the Diadem Jewelers store at 1613 Sherman Ave. downtown was robbed about 11:15 this morning.
Police say the clerk in the store told them that a man entered the shop, brandished a handgon and announced the robbery.
The robber then used flexible plastic bindings to tie the clerk’s hands and grabbed jewelry from display cases, putting the items into a gym bag and backpack.
He then fled the store through a rear door, fleeing the area on foot.
Police were called by a person passing by the store who looked in and noticed the victim who was still bound.
The victim described the robber as a 6-foot- tall black male, about 30 years old, weighing 250 pounds. He was wearing a baseball cap, sunglasses, scarf, black leather coat, dark jeans and dark gym shoes.
Police Cmdr. Tom Guenther says detectives are conducting interviews and collecting evidence and haven’t yet determined what jewelry items are missing.