Police are investigating a possible case of road rage.
According to police, the incident started after a traffic-related incident just after 1:40 a.m. Sunday on Nimitz Highway.
Police say 23-year-old Jace Kaopua of Salt Lake, allegedly struck a 47-year-old man with a closed-fist while the victim was sitting in his car.
Kaopua was arrested for violent unauthorized entry into a motor vehicle.
He was released pending further investigation.