'Pushback' policy: Refugees in Serbia fear deportation

Hundreds of refugees living in terrible conditions in the Serbian capital are refusing to go into official camps, fearing it will lead to their deportation.
Thousands of Afghans and Pakistanis have been deported en masse from countries in Europe.
In Serbia, hundreds were rounded up and moved back to the border with Macedonia.
The UN has condemned European countries for what it is calling a policy of “pushback”.
Al Jazeera's Laurence Lee reports from Belgrade.