A CNN team in Mariupol saw a large plume of smoke from artillery fire less than three miles from the main Ukrainian checkpoint heading out of the southeastern port city toward the border town of Novoazovsk , which Kiev said last week was seized by Russian troops . Ukraine 's president meets with the heads of NATO countries in Wales . Ukraine is bolstering its military partnership with NATO , Poroshenko says . Comment: NATO 's chief cautions that earlier Moscow 's remarks on peace went nowhere .
Ukraine 's president meets with the heads of NATO countries in Wales . Ukraine is bolstering its military partnership with NATO , Poroshenko says . Comment: NATO 's chief cautions that earlier Moscow 's remarks on peace went nowhere .