State media in China reports 21 people running a mountain ultramarathon have died after hail, freezing rain and gale-force winds hit the race.
Search teams confirmed the safety of 151 out of 172 participants, with eight reportedly hospitalized.
The 21 runners who died suffered from a sudden drop in temperature.
According to one participant, the forecast did not predict the extreme winter-like conditions. Some runners were dressed only in short-sleeved tops and shorts.
Additional reporting by The Associated Press.