瑞典为阻止移民涌入而实施边境控制

Travelers passing from Denmark into Sweden will have to show photo identification starting Monday.

The move by Sweden is an attempt to stop the flow of undocumented migrants into the country known for its generous welfare system. The new measure means Sweden is closing its open-door migrant policy after receiving 160,000 migrants last year. Neighboring Denmark only took in 18,000.

Travelers have been warned to expect long lines on the Danish side of the Oresund Bridge, a major entry point for migrants seeking a new life in Sweden.

The re-introduction of the border controls between Sweden and Denmark means that travelers between the two Nordic countries will have to show their passports for the first time in more than 50 years.