What started out as a State Street challenge between two groups of cruisers escalated into a carjacking in the city early Sunday, with the suspects later accused of robbing a southern Utah gas station.

Utah Highway Patrol trooper Larry Orton arrested two men and a woman after spotting a vehicle described as the getaway car used in the Cedar City robbery of the C-Mart Texaco.In that incident, the clerk was approached by two men who threatened the employee with a crowbar.

The clerk was forced to the floor of the business and then called 911 after the robbers left with cash.

It turns out the car they were driving had been taken from some high school students earlier on Sunday after a confrontation on State Street.

A police report said the two groups of people met up on State Street at 3:42 a.m. Sunday, where the aggressors became angry because the victims were driving too slow.

Both groups eventually wound up at 748 N. 900 West, where the assailants assaulted the victims and then took off in their car.

The victims immediately called police from a nearby gas station and the car's plate number, model and make were entered into a national crime data base.

By 5:15 that afternoon, the trooper spotted the car at an exit not far from Cedar City. It matched the description of the car used in the robbery and came back as stolen out of Salt Lake City.