These pictures reveal Syrians' desperate struggle to survive after fleeing Idlib violence

Members of a family of internally displaced Syrians eat together in an underground shelter where several families from Aleppo and Idlib provinces are taking refuge.
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Aref TAMMAWI / AFP
More than 900,000 people have fled the latest violence in northwest Syria since December 1, according to the UNHCR.
They have scrambled to escape a widening, multi-front offensive by Syrian President Bashar Assad’s Russian-backed forces
The displaced hide in underground caves, unfinished shelters and cemeteries. Some burn clothes to ward off freezing temperatures.