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CHICAGO — Police are investigating after a 36-year-old woman staying at a popular River North hotel was followed into her room by an armed man, bound, raped and robbed Saturday night.

Chicago police say a man armed with a gun followed a woman into her sixth floor room in the Godfrey Hotel, then bound her with duct tape and zip ties before sexually assaulting her. The man then took her ATM card and forced her to give him the pin before he left, according to police.

Godfrey Hotel General ManagerGeorge Jordan said the woman was discovered by hotel staff after the door was left open.

“There was a guest who noticed a door ajar on one of the floors and notified the front desk. The front desk dispatched security and security found a guest in distress — I’ll put it that way,” Jordan said.

Police were called immediately, Jordan said, and while he left the scene, the suspect was captured on “tons” of surveillance cameras. The suspect is described by police as a “heavily tattooed” white male with a goatee, standing 5’10” and last seen wearing a white shirt and jeans.

Jordan said the woman appeared to have been targeted.

“The assailant went to a particular room. The assailant knew where he was going — it wasn’t randomized in that regard,” Jordan said.

The victim was treated at Northwestern Memorial Hospital and released earlier Sunday, according to Jordan.

The Godfrey does have security measures requiring guests to use a key card to access floors after 9 p.m., but the assault happened before that time. Neighbors said they were surprised something could happen in a high-end hotel.

“It’s a nice hotel. I would never think something like that would happen around here,” River North resident Amber Kratochvil said.

Investigators say they have leads to follow from evidence found inside the room, including the duct tape and DNA, and surveillance video from inside the hotel.