A four-month-old baby boy has fallen from an escalator in a department store in China's Shanghai. He is said to be in serious condition. The accident happened Saturday on an escalator from the third floor to the second floor, some 10 meters above ground. The boy was in his grandma's arms when she stepped onto the escalator. The grandma, however, stumbled and the boy slipped out of her arms and fell. The boy was rushed to hospital and is being treated.