Olympic champion Karsten Warholm won his 400-meter hurdles race on Sunday and then turned to join in the crowd booing environmental protesters who disrupted the Diamond League event near the finish.
Three people kneeled on the track about eight meters (yards) from the line holding two banners that spanned from lanes one to six, forcing runners to break through them. No athlete appeared to be hurt.
Warholm running in lane eight had no barrier in his way though seemed distracted, with a fourth apparent protester squatting in lane seven seeming to photograph the incident.
