The Ukrainian government has been battling some protests for some time now. Recently the government had banned all sorts of protest, which they classified as masses any larger than five. With this new legislation in place, the government managed to take the riots and protests to violent levels, and the first three protesters were killed yesterday. The riots are taking place because of the current conditions of Ukraine, the economy is bad and the government is corrupt. The citizens are split in the country, either supporting President Yanukovych or hating him. Russia has offered economic aid, but many citizens wish that the government would take more help from the West in Europe. The protests will likely continue until the government collapses, or until the protesters are massacred, whichever happens first. You can read more about it here.