Ok, police had arrived, we filled in all the paperwork, they said that there is _some_ chance that thief will be found, but I'd better to save on a new bike, too much cases already, and adviced what to do if I see it myself, and never ever park it on that particular spot...
Damn all bike thieves.
P.S. When buying, ask a clerk to put s/n in as legible handwriting as possible, I'm still not sure thart whatever ended up in my testimony is the real s/n.