The crash occurred at about 8.15pm at the intersection of Main Road and Flower Street in Fairfield, and involved a collision between an Isuzu 4WD utility vehicle and a cyclist.
The 43 year old male cyclist remains in a critical condition in Dunedin Hospital as a result of the crash.
Dunedin police are urging any witnesses to the crash to contact them on Ph 03 471 4800.
Alternatively, information can be provided anonymously via the organisation Crimestoppers on Ph 0800 555 111.
ENDS
Released by Senior Sergeant Darryl Lennane, Southern Police