CPD said officers were responding to a call at the Virgin Hotels on Wabash Avenue in the Loop, when they discovered various electronic items and postal property in a vacant room.
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The officers were caught on camera just after midnight Tuesday carrying out mail items, hauling several large bags out of the hotel for hours.
CPD said Area Three detectives, along with the U.S. Postal Service, are now investigating, and the property will be taken into inventory.
The U.S. Postal Inspection Service confirmed the investigation later Tuesday morning, saying it was looking into how someone got ahold of the stolen postal property, why and what they were using it for.
This comes in the wake of many local mail carriers being targeted.
RELATED: Chicago postal worker traumatized after robbed at gunpoint while on the job
Thieves have been stealing their master arrow keys at gunpoint in many instances across the city.
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It's something the postal carrier union is very concerned about. They have reached out to city and state leaders for help.
No one was in custody Tuesday morning.
Anyone affected by mail theft, mail fraud or any other criminal activity using the mail is encouraged to file a local police report and to call the U.S. Postal Inspection Service at 877-876-2455.
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