GRAND RAPIDS, Mich. (WOOD) — Some runners that went off-course during the 10K race at the Amway River Bank Run were disqualified.

It seems that a series of events caused confusion for some of the participants.

According to race organizers, one of the lead vehicles was forced to stop because it was catching up to other runners and it was becoming a safety issue. Therefore, it veered from the course, stopped, corrected the issue and continued the course.

“A few athletes continued on what they presumed was the correct course. When the athletes noticed their error, they attempted to correct the error by returning to the course. However, their deviation from the measured course resulted in a lesser distance completed by those athletes,” said race director David Madiol in a statement.

Since the deviated course was shorter than 10K, those runners were disqualified.

“While we regret any challenges, any athletes have with our course it is ultimately up to the athlete to know the course. We will be reviewing procedures and working with the USATF Officials to ensure we meet all of their guidelines,” Madiol said in a release.

According to River Bank Run’s race results on its website, Spencer Shellberg, 24, of DeWitt won the men’s race. Iveen Chepkemoi, 21, of Lansing won the women’s 10K race.