Today the details of the terrible accident have become known. The police found out that a 58-year-old KamAZ truck driver hit an 11-year-old cyclist who was moving in the same direction along the right edge of the road: when turning, the girl lost control and fell under the wheels of the truck. This happened around 12:30. The driver was sober at the time of the accident.
Resource :
https://www.rabochy-put.ru/news/190277-stala-izvestna-prichina-smertelnogo-dtp-s-uchastiem-11-letney-devochki-v-smolenske.html