Refugees queue up for a bus, as they arrive at the border between Austria and Hungary, Heiligenkreuz, Austria, late Tuesday Sept. 15, 2015. Austria's Interior Ministry says temporary border controls with Hungary will be in effect immediately after midnight Tuesday. The ministry says the measure could be extended to the country's borders with Slovenia, Italy and Slovakia, if needed. That reflects the possibility that migrants now streaming into Austria from Hungary could instead try to cross into Austria over those borders in large numbers. (AP Photo/Christian Bruna) (The Associated Press)
Austria has begun selective controls of vehicles at three main border crossings with Hungary as it tries to impose some order over the stream of refugees and other migrants from that country.