CHICAGO (CBS) — Burglars got away with high-end watches valued at a half million dollars from the New York Jewelers store in the Loop early this morning.

The burglar alarm sounded around 5:40 a.m. at the store on Jeweler’s Row, 11 N. Wabash.

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Police arrived to find several glass display cases on the second floor smashed and expensive watches missing. Some were left on the floor.

Police say there was a large, movable sign placed in front of a window. They believe the burglars put it there so they wouldn’t be noticed breaking in.

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There was a similar burglary at another Jeweler’s Row store about a month ago at the same time of day.