This is reported by "Championship" with reference to the Ministry of Emergency Situations in the Kirov region.
The sporting event took place in the sports complex "Veresniki", children born in 2010 took part in the race.
On the fact of the incident, the Investigative Committee of Russia for the Kirov region is currently being checked.
A group of investigators left for the scene.
Earlier, Kenyan runner Chepengetich set a new world record in the half marathon.