In early 2014, there were clashes between rival groups of protestors in the Ukrainian city of Odesa, during the pro-Russian unrest that followed the Ukrainian Revolution. The street clashes were between pro-unity protesters and anti-government (anti-Maidan), pro-Russian protesters. Violence erupted on 2 May, when a 'United Ukraine' rally was attacked by pro-Russian separatists. Stones, petrol bombs and gunfire were exchanged; two pro-Ukraine activists and four pro-Russia activists were shot dead in the clashes. The pro-Ukraine protesters then moved to dismantle a pro-Russian protest camp in Kulykove Pole, causing some pro-Russian activists to barricade themselves in the nearby Trade Unions House. Shots were fired by both sides, and the pro-Ukraine protesters attempted to storm the building, which caught fire as the two groups threw petrol bombs at each other.