More than 100,000 migrants have passed through Serbia this year, mainly from countries such as Syria, Iraq and Afghanistan, to seek sanctuary in the wealthy countries of Europe. <br></br>A ray of light falls on a migrant in a warehouse in Belgrade, Serbia, Nov. 11, 2016.

A thousand migrants have occupied a derelict warehouse in the capital of Belgrade. A migrant wrapped in a blanket sleeps on the floor.

Border closures have left many stranded. Migrants cook onions inside a warehouse.

According to the U.N. refugee agency, around 6,400 migrants are currently registered in Serbia, while local non-governmental organizations say their number is close to 10,000. Rays of light shine through holes on walls of a warehouse.

Most of the migrants registered in Serbia arrive from Bulgaria and Macedonia. Migrants walk outside a warehouse at night.

A migrant sleeps on a piece of cardboard placed on the floor.

With the temperature near zero, migrants warm themselves and prepare food by the fire.

Wrapped in blankets, migrants rest on the concrete floor. There are no toilets around.

Serbian government and humanitarian agencies offer the migrants accommodation in refugee centers with heating and food - but despite the misery of their situation, they do not want to go. A migrant warms himself by the fire.

Doing so would formalize their situation and with neighboring European Union state Hungary letting in only between 10 and 30 migrants a day, migrants might have to wait up to nine months to exit Serbia legally. Migrants wrapped in blankets sleep on the floor.

Migrants brush their teeth outside the warehouse.

A migrant shaves his friend outside the warehouse.

A migrant listens to music on his mobile phone.