reports, Alexander Zakharchenko, prime minister of the self-proclaimed Donetsk People’s Republic, confirmed that militia units had launched an offensive on Mariupol and Debaltseve.Authorities in Mariupol said at least 30 people were killed when the government-held city in eastern Ukraine was hit by shelling on Saturday. The Ukrainian Ministry of Internal Affairs blamed the attack on pro-Russian separatists fighting in the east of the country, while the United Nations Secretary-General Ban Ki-moon condemned the rocket fire into civilian areas. This video is described as showing the firefight at the Ukrainian checkpoint in Debaltseve. Credit: Radio Free Europe/Radio Liberty">