Officers first responded to a minor collision between two vehicles just after 7 a.m. at Orange and Church.
One of the drivers left the scene, and the second driver involved chased him down Church to Cedar.
As officers arrested one of the drivers involved on suspicion of DUI, a third vehicle passed by and struck a bicyclist.
The bike ride had minor injuries and didn't go to a hospital.
The vehicle that hit the cyclist sped away, and investigators are now searching for the suspect.