Marathon Handbook reports a runner was banned for three years after tying a 9-year-old boy to his waist during the Zhengzhou Marathon. The boy was half the age of the youngest allowed entrant. The runner's result was thrown out, and he received a three-year ban.

Footage of the incident circulated online, showing the boy struggling to keep pace. The runner's pace was around eight minutes per mile, completing the half-marathon in about 1:45. The organizers did not confirm if the boy finished. Read more racing coverage.

Under Zhengzhou's rules, entrants must be at least 18 for the half-marathon. Doctors warned of risks for children running such distances, including heat management and heart development issues. Related: Weini Kelati to Debut in NYC Marathon.

This original Runner World brief is based on reporting from Marathon Handbook. Visit the source for its complete reporting, context and any later corrections.