Young refugee carries supplies through muddy camp

A boy carries food and water at a refugee camp near Thessaloniki on Thursday as a cold snap intensified. Thousands of refugees and migrants are to be relocated indoors from tent camps in Greece as temperatures have fallen below zero, the United Nations refugee agency, UNHCR, said. Freezing temperatures, rain and snow in parts of the country have made living conditions for migrants even tougher than usual. [Sakis Mitrolidis/AFP]