Trouble Company, a notorious Kiev hooligan group, posted a string of messages
One message began 'Welcome to hell,' while another encouraged further violence, reading 'F**k em up CSKA', referring to the Russian football club CSKA Moscow.
The Trouble Company is made up of fans of the CSKA Kiev team, which disbanded in 2009 after financial troubles - however, its support have close ties with Russian team.
Last time I check Kiev was in Ukraine.
A fistfight where every now and then a hockey game breaks out.
Plenty of Russians live in the Ukraine.