Rescuers in China pull a man from the twisted wreckage of his truck.
He was injured in a crash in the western province of Xinjiang, where heavy fog clouded roads and grounded flights.
Visibility here is less than 10 metres, making the roads treacherous.
Forecasters say this is the heaviest fog the region has seen in months.
In the city of Urumqi, over 20 flights have been cancelled and 80 more delayed.
More snow and rain is expected over the weekend.
Andrew Raven, Reuters