Amnesty International said Sunday it “deeply regrets the distress and anger” caused after it alleged Ukrainian forces were flouting international law by exposing civilians to Russian fire. The rights group said “We fully stand by our findings,” but stressed “nothing we documented Ukrainian forces doing in any way justifies Russian violations.” Amnesty sparked outrage in Ukraine with the publication of a report on Thursday that accused the military of endangering civilians by establishing bases in schools and hospitals, and launching counter-attacks from heavily populated areas. The head of Amn…