Most of the times I am inclined that snipers are 3rd party working for the benefit of pushing around people/police/media.
Here's a medical worker who had been shot https://twitter.com/HromadskeTV/status/436445556664066048/ph...
Here's a video of sniper shooting at people: https://www.facebook.com/photo.php?v=570573343039007&set=vb....
http://espreso.tv/new/2014/02/20/poranena_v_shyyu_volonterka... (in Ukrainian)
From yesterday's news:
According to [Ukrainian Security Service head] Yakimenko, “over the last day more than 1,500 firearms and 100,000 rounds of ammunition have come into the hands of criminals.”
...
Meanwhile in Ivano-Frankovsk, rioters have seized 268 pistols, 2 rifles, 3 light machine guns, 92 grenades and 15,000 ammunition rounds, the deputy head of the Security Service, Vladimir Porodko, has said, adding that the police are searching for the stolen arms.