CHICAGO — The U.S. Postal Service is warning about some temporary service disruptions in the week before and during the NATO summit.

As a security precaution, designated street collection boxes within the downtown area, including McCormick Place, and along the designated march route will be removed from May 13-23. The summit runs May 20-21.

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Protesters are planning their major march on May 20–starting in Grant Park and heading south to near McCormick Pace–and security will be extremely tight downtown, especially in the South Loop and around McCormick Place.

CLICK HERE FOR A LIST OF AFFECTED MAIL BOXES

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Mail delivery may be affected from May 16 to May 21 in ZIP Codes 60601-60605, 60606, 60607, 60610, 60611, 60616, 60654 and 60661.

“The Chicago District of the U.S. Postal Service plans to maintain regular mail delivery, collection, processing and retail operations to the fullest extent possible during the NATO Summit,” according to a news release.

Possible impacts to service could occur from May 14 through May 22; the peak impact period is May 18 through May 22, the postal service said.

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All Chicago District stations and branches will maintain their current retail hours, including the Main Post Office, 433 W. Harrison St., which is open until Midnight Monday through Saturdays and until 9 p.m. Sundays.