NORTH CHICAGO, Ill. - Local officials were informed on Friday that the U.S. Department of Homeland Security closed its command center at a north suburban naval base.

What we know:

Great Lakes Naval Station was providing support for DHS operations in the Chicago area for the last two months or so, during which time federal immigration agents were engaged in Operation Midway Blitz.

DHS claimed on Friday that more than 4,000 undocumented immigrants have been arrested in the Chicago area during the operation.

City of North Chicago officials were informed of the closure late Friday afternoon, according to Gregory Jackson, the chief of staff to the city’s mayor.

A spokesperson for DHS did not immediately respond to a request for comment about the reported closure.

The backstory:

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