Wednesday morning update: Huntsville police say this is now a criminal investigation.
Update: Huntsville police say the bicyclist died from their injuries.
The Madison County Coroner says he is on the way to the scene of the wreck at Wall Triana Highway and Boeing Boulevard.
Madison County emergency crews are responding to Wall Triana after a bicyclist was hit by a vehicle.
Bystanders were giving CPR to the bicyclist, according to Frank McKenzie with Huntsville Fire and Rescue.
Stay with WAAY 31 on air and online for updates.