Most of those without valid papers were stopped in southern Switzerland: 4,832 in canton Ticino and 3,122 in canton Valais.
Regarding nationality, 2,433 people were from Nigeria, 1,176 from Gambia, 803 from Algeria, 792 from Morocco, 685 from Albania and 663 from Eritrea.
The previous year’s list was headed by people from Guinea, Nigeria and Gambia. In 2016, some 12,294 people had travelled from Eritrea alone.
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Zurich wants ID cards for all – even illegal immigrants
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