Description:More than 3,000 rail commuters were affected in China on Saturday after a reservoir in the northern Shanxi province partially collapsed due to old age, according to local officials quoted by state media. The top of an irrigation drain of the Quting Reservoir in Hongtong County caved in at about 07:00 am on Friday, leading to the partial collapse of its dam walls, China state television CCTV reported.(1:14)