people have died running a marathon in china after the race was hit by extreme. bad weather is alexia o'brien. they see it off early on saturday, for 100 kilometer ultramarathon, and 172 runners crossing the stoplight and just t shirts. and shorts for a track that winds its way through the mountainous yellow river stone forest and china's northern gone soup province. but hours later, the temperature dropped and the race was hit by hail freezing, rain and high winds goes and in this incident is a public safety incident caused by sudden changes in weather in the local area. the provincial authorities have established an incident investigation team to further investigate its cause. the race was stopped after athletes went missing in the extreme weather and a search was launched. hundreds of rescuers tackled complex terrain, including narrow, high altitude paths, helped by thermal imaging, drones and radar to take the local media say some of the runners had fallen off the track into deep mountain crevices. temperatures plummeted further over night, making the search more difficult. so if i should