The pileup took place on a bridge that was shrouded in heavy morning fog, which caused multiple vehicles to crash, according to state-owned The Global Times.Photos from the scene show the long multi-lane bridge, stretching across fields and the Yellow River, strewn with vehicles crammed into each other.One clip shows a truck sliding forward, crashing into several smaller cars, as sirens ring in the distance.Several hours after the pileup, police had issued a warning for cars not to cross the bridge due to the fog.“In the winter the temperature is low and there is often heavy fog,” traffic police posted on their official account on Weibo, China’s version of Twitter."