Europe’s Migrant Crackdown

German chancellor warns of need to share burden across EU; Austria steps up border, highway checks.

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 after discovering the decomposed bodies of 71 people, most of them believed to be Syrian refugees, in an abandoned truck last week.

Authorities also stopped and boarded several Germany-bound trains overcrowded with hundreds of migrants, refusing entry into Austria until some of them got off. Migrants had packed into the trains in Hungary earlier in the day after officials in Budapest abruptly lifted rules barring them from traveling further into the European Union without visas.

Such temporary checks remain in accord with the Schengen Agreement, which allows people to travel freely across the borders of 26 European countries that have signed onto the treaty. But in Berlin, German Chancellor Angela Merkel cautioned that some countries could move to reintroduce systematic passport controls at their borders—unless EU governments agreed to more equally bear the burden of the bloc’s escalating crisis, “Europe must move,” she told reporters in Berlin. “Some will certainly put Schengen on the agenda if we don’t succeed in achieving a fair distribution of refugees within Europe.”

Ms. Merkel’s warning—aimed at governments in the bloc’s east that have resisted taking on a greater number of migrants—marked her most direct intervention in the fraught debate between those European countries, such as Germany, Italy and France, that have called for a fairer distribution of migrants across the bloc, and those that have opposed binding quotas.

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