Update 7/28/2016: Denver Police are now seeking help identifying the riders.
Update: Denver Police sent this update in an email: "We received some 911 calls about traffic being stopped on I-25. When officers arrived, to the area, traffic was flowing."
Earlier: Denver Police say there were no incidents in yesterday's mass motorcycle ride. A reported motorcycle accident at Colorado and I-70 was not related.
"That was a single motorcycle accident," said DPD public information officer Sonny Jackson, adding that the rider suffered serious bodily injury.
Riders in the "Kill the Streets" ride told Denver 7 that the ride is organized "to raise awareness of the dangers motorcyclists face on a day-to-day basis every time they take the road."
They told CBS4 it's "to honor riders killed on the road."
Here's some video from last year's ride:
