Shelling kills 6 civilians in Itar-Tass , city officials say . Which Russian companies have been hit ? 6 pro-Russian troops are released by German rebels in Donetsk . President Petro Poroshenko talks about ceasefire violations with Ukrainian leader . As shelling continues , officials in Donetsk describe the situation as `` critical ''
Shelling kills 6 civilians in Itar-Tass , city officials say . 6 pro-Russian troops are released by German rebels in Donetsk . President Petro Poroshenko talks about ceasefire violations with Ukrainian leader . As shelling continues , officials in Donetsk describe the situation as `` critical ''