Russians hit Ukrainian military base near Polish border in war's westernmost attack

Russian troops launched an airstrike on a Ukrainian military base just 15 miles east of the Polish border, officials said Sunday, in what appeared to be the westernmost attack of the war, according to a report. 

NATO sometimes conducts joint military exercises with Ukraine at the International Center for Peacekeeping and Security training base in Yavoriv and U.S. and other foreign troops had been at the base before the invasion, according to Reuters. Poland is a member of NATO.