CHICAGO (CBS) — Police were investigating after someone smashed a window at the Best Buy on the Magnificent Mile, and stole cell phones from the store early Thursday.

Around 4:30 a.m., police responded to a burglar alarm at the Best Buy in the Hancock Center, at 800 N. Michigan Av.

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Officers discovered a broken window, and searched the building, discovering an unknown number of cell phones had been stolen.

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No one was in custody early Thursday.

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Area Central detectives were investigating.