Excerpts from NBCChicago.com:
Smoke and falling glass were reported in an extra-alarm fire at the Old Chicago Main Post Office building Tuesday morning that ultimately blocked the Eisenhower Expressway. Fire officials reported a blaze on multiple floors at 404 W. Harrison St. .
This marks the second fire in as many years at the vacant building, which also caught fire in November 2014. That blaze was believed to have been caused by trains running under the structure.
The United States Postal Service vacated the building in 1997 for a newer facility.
From CFD Media:
Alert. A 2 11 alarm fire. fire on multiple floors of old post office. This is NOT a drill
2-11 on Harrison update, all companies working, secondary search underway. No injuries at this time. 4-1-11
2-11 update: all companies working making progress, ventilation underway. No injuries at this time.
2-11 on Harrison: Seat of fire being attacked progress being made, companies being rotated, No injuries at this time.
The 2 11 alarm for fire in the old post office has been struck o ,ut. The associated plan one has been secured. There are no injuries