Using google translate. This is my understanding of it.
Odessa has had several peaceful rallys by both pro-russia and pro-ukraine groups prior to this day. Another peaceful rally was held by a pro-ukraine crowd. On this particular day there was a football(soccer for americans) match. One group of hooligans/thugs/pro-russian militants gathered across town. They marched across town and confronted the peaceful pro-ukraine rally, where they met resistance from a similiar group of pro-ukranian militants. One thing led to another, people got hurt. The pro-russian militants pulled back to their temporary HQ, pro-ukranian militants followed, fire consumed, people died.
Correct?
Pro-ukraine rally
Across town, pro-russians gather
They march towards the pro-ukraine rally
Where they meet resistance