Interior ministers from six European Union countries on Monday said their nations had agreed to step up efforts to protect the bloc from illegal immigration and target groups of human smugglers that operate on its borders.
Some EU governments worry that increasing pressure from the so-called Balkan migration route, which leads from Serbia into Hungary, requires a tougher response from countries in the region.
Around 13 of the EU 's 27 member countries have reintroduced internal border checks with their neighbors in recent months, a deviation from the normal border-free travel enjoyed in the Schengen zone.
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