When doing a google image search on a screen shot of the sign, I found a couple of matches:

http://www.travbuddy.com/Kulyab-travel-guide-1325354/photos#... http://serious.tumblr.com/post/39645197/beware-of-landmines-...

Could it be that the sign is in Tajik and not Russian? (I speak neither of those languages, so I wouldn't know…)