Hi Guys, I found these pics. There is no info on the location. The mass grave was found during building work. As can be seen, most of the items found are Soviet, inc PTRD/PTRS 14.5mm anti tank rounds, a PTRS bipod, DP28 and mags, scout knife, personal effects of razor and mirror, fountain pen, etc.
The dog tag in the form of a black plastic tube, which the reel of paper came, from should give the id of the remains to at least one soldier.