Officers said four female suspects walked into the Nordstrom at Westfield Old Orchard mall and stole whole racks of items, carrying more than $10,000 worth of high-end purses, scarves and socks.
Police said one of the thieves threatened a guard with a bolt cutter. They all appeared to be in their early 20s, and several male suspects also helped in the store's parking lot, according to police.
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Officials are looking for a purple Pontiac Bonneville with Illinois license plates in connection with the incident.
The alleged robbery took place just after 11:10 a.m. No one was injured, police said.
Anyone with information is asked to call Skokie police at 847-982-5900. The 24-hour Skokie Crime Tip Hotline is 847-933-TIPS. Tipsters can also text "Skokie" and the information to 847411.