A number of cyclists were involved in a shocking accident at high speed Sunday when a spectator pulled a barrier across the road, causing riders to flip over.

According to local journalist Antoine Forestier, the man who brought down the barrier was the father of a rider who had been involved in a crash earlier in the race.

L'homme qui a fait tomber les barrières est le père d'un coureur victime d'une chute, énervé que la course n'ait pas été stoppé. #TCAR Article continues below ... — Antoine Forestier (@a_forestier) September 4, 2016

Journée mouvementée sur la 1ère étape du tour de la réunion.. Et un imbécile qui met la vie de sportifs en danger 🤘🏻 pic.twitter.com/XINGNlABvB — Enzo Bernard (@enzobernard85) September 4, 2016

The incident occurred during the Tour Cycliste Antenne Reunion, held on a small French island called Reunion off the east coast of Madagascar.

(Thanks to Deadspin for sharing this video.)