Ukrainian Troops Make Push Into East Ukraine City Held By Trained Pro-Russia Gunman

Ukrainian troops are moving in on what Reuters describes as "pro-Russian armed men" in the east Ukraine city of Slaviansk (here's video).

These are what some of the pro-Russian gunman look like. Notice the weaponry, armor, and small communication devices.

Things appear to be escalating, and if both sides are led by special forces soldiers from Russia and Ukraine, things could get ugly.

Ukrainian troops on the outskirts of #Slovyansk (Kirill Kudryavtsev/AFP) pic.twitter.com/cixDACgC8G via @mikewhills

- Maxim Eristavi (@MaximEristavi) April 24, 2014

#Ukraine military operations underway in southeast. Will surely be better organized. Making Russian response more likely..

- ian bremmer (@ianbremmer) April 24, 2014

Ukraine truce officially done for. Kremlin, looking for any excuse for more trouble, now has one.

- ian bremmer (@ianbremmer) April 24, 2014

Other Ukrainian cities contain the same kind of professionally trained pro-Russian men. Here's a "pro-Russia protester" standing guard outside a eastern Ukraine regional government building in Donetsk on April 22.

Here's a look at the cities at issue in the "Novorussia" crisis. Slaviansk is in northern Donetsk.