Ukraine says at least thirteen soldiers are dead after an attack by pro-Russian separatists in the east.<br/> <br />Video obtained by Reuters shows bodies being carried away on stretchers.<br/> <br />Authorities in the Donetsk region, where the attack took place, put the death toll at 16.<br/> <br />It is unclear if all the victims were soldiers, or also included separatists. They said 32 people were injured.<br/> <br />The attack fuels security concerns ahead of Ukraine's presidential election on Sunday.<br/> <br />Ukraine has called for an emergency session of the U.N. Security Council to discuss Moscow's role in the violence.<br/> <br />.
