Muhammed Usman (18) from Pakistan at a migrant aid centre in Belgrade after being caught and sent back from the Serbia-Croatia border. Photograph: Daniel McLaughlin

Mohammed Usman arrived back in Belgrade with a grazed nose, sore ribs and another failure to add to his list of attempts to reach the European Union. (...)

Five migrants squat in the snow as they eat a warm meal distributed by aid groups and others queue for food, in Belgrade on Thursday. Photograph: Darko Vojinovic/AP

A brutal cold snap that has killed dozens of people from the Baltic to the Black Sea is deepening misery and compounding danger for thousands of refug(...)