As a Dnipro ex-resident that has been there: Yuzhmash is about 30 stores deep underground Lower then the metro line (and there is only 1 metro line in the city that has been in the construction struggle state for about 30 years lol) Lowest 6 floors are restricted access
zone. During the soviet times warheads were at the final assembly
there. Only approved personnel
allowed. According to some local sources all this is now
gone. Warheads gone deeper than -30
floor. What was there during this war is unknown but from what i heard some signs were dubbed in English and there is a known nflux of some native English speaking people in Titovo (part of the city near yuzhmash) and Dafi (local shopping mall). Rest are conspiracy theories