A migrant walks out of a makeshift shelter at an abandoned warehouse in Belgrade on January 10, 2017, as temperatures dropped to -15 degrees Celsius overnight. According to the latest figures, around 7000 migrants are stranded in Serbia. / AFP / ANDREJ ISAKOVIC (Photo credit should read ANDREJ ISAKOVIC/AFP via Getty Images)
Migrants warm up at a makeshift shelter in an abandoned warehouse in Belgrade on January 8, 2017, as temperatures dropped to -15 degrees Celsius. According to the latest figures, around 7000 migrants are stranded in Serbia. / AFP / OLIVER BUNIC (Photo credit should read OLIVER BUNIC/AFP via Getty Images)
An Afghani migrant poses for a picture in a makeshift shelter at an abandoned warehouse in Belgrade on January 10, 2017, as temperatures dropped to -15 degrees Celsius overnight. According to the latest figures, around 7000 migrants are stranded in Serbia. / AFP / ANDREJ ISAKOVIC (Photo credit should read ANDREJ ISAKOVIC/AFP via Getty Images)
A migrant from Afghanistan poses in front of a makeshift shelter in a abandoned warehouse in Belgrade on January 8, 2017, as temperatures dropped to -15 degrees Celsius. According to the latest figures, around 7000 migrants are stranded in Serbia. / AFP / OLIVER BUNIC (Photo credit should read OLIVER BUNIC/AFP via Getty Images)
A migrant washes his face in a makeshift shelter at an abandoned warehouse in Belgrade on January 10, 2017, as temperatures dropped to -15 degrees Celsius overnight. According to the latest figures, around 7000 migrants are stranded in Serbia. / AFP / ANDREJ ISAKOVIC (Photo credit should read ANDREJ ISAKOVIC/AFP via Getty Images)
