It may be a tad late for this info to do much good, but if you heard noises in the fire corridor today, a resident sent me this to share:

“Today after hearing scraping and banging behind the fire exit door of my unit on the fifth floor, I found an open beach chair in the fire hallway just in front of the fire hallway door which opens to the stairway and the door’s lock was taped to remain unlocked. At first I thought someone had tried to break in and had been spending time in the hallway after Ron had told me no one was working on the fire floors. Then later I saw Ron again and he said he had just found out that his guy was replacing lights on the fire floors which are right next to the rear unit doors.”