Hungary brought in tough new laws on Tuesday to stop the entry of illegal migrants.
Police can now detain anyone who tries to get through a razor-wire fence built on the border with Serbia.
Refugees and migrants continue to arrive from Serbia into Hungary by the thousands. But now, thanks to requests from the Hungarian government, UNHCR is helping bring order and more speed to dealing with the newcomers.
Hungary brought in tough new laws on Tuesday to stop the entry of illegal migrants.
Police can now detain anyone who tries to get through a razor-wire fence built on the border with Serbia.