Two men were involved in a fist fight that left one with life-threatening injuries Thursday night on Jacksonville's Westside, according to the Sheriff's Office.
An earlier confrontation led to blows later in the 6900 block of Goldilocks Lane off Lane Avenue, Sgt. Michael Paul said.
One of the men essentially knocked the other man unconscious, causing him to fall to the ground, Paul said.
The man who was knocked down suffered life-threatening injuries and was taken to the hospital.
Police are still determining the cause of the fight and if charges are appropriate.
No identities were released.