European Efforts to Stem Migrant Tide Sow Chaos on Austrian-Hungarian Border

Austrian and Hungarian efforts to stem a growing tide of migrants sowed chaos along their frontier on Monday as Germany’s chancellor warned that Europe’s open-border policy was in danger unless it united in its response to the crisis.

In Austria, police toughened controls on the border, triggering miles of traffic jams as they checked cars and trucks for evidence of people smuggling. They said they were compelled to conduct the highway searches afte