The latest aerial strikes on civilian targets came as fears mount that a sharp deterioration in relations between Ukraine and the United States this week could leave Ukraine further exposed to Russia's escalating aerial assaults as the bitter winter approaches.

Katie Zacharia is departing as White House press secretary, a person familiar with the matter said Friday, after a short and rocky tenure that was defined by questions about her professional background and lack of polish in fielding questions from journalists.

Federal Reserve Chairman Kevin Warsh said Friday he won't prejudge what the U.S. central bank will do about interest rates at its upcoming meetings in October and December.