There's plenty of reports on it:
http://www.militarytimes.com/story/military/2015/07/31/austria-turns-back-us-troops-over-arms-luggage-weapons-ukraine/30926215/
http://bigstory.ap.org/article/9dbc0d1607c24eea8da8a068f97bb8f8/austria-turns-back-us-troops-over-arms-luggage...