The men reportedly began threatening to "f*cking kill" and "shoot" the protesters, before eventually offering the Nazi salute and shouting "Heil Hitler".
Tenbrink told reporters on camera that he admired Spencer ─ who speaks in favor of creating a white "ethno state" ─ because he was "not afraid to say the things that no one else will". Police say the victims were at a bus stop not far from the event, when a Jeep with four men inside pulled up and started yelling at them.
Gainesville police confirmed Friday the arrests were related to the event. The vehicle pulled away momentarily, and then quickly stopped. According to police, Tenbrink got out of the vehicle with a handgun and threatened to kill the victims, while the two other men encouraged him to shoot them.
Tenbrink jumped out of the vehicle brandishing a handgun, while William and Colton allegedly yelled, "I'm going to f-ing kill you!" and "Shoot them!" according to the paper.
Gainesville area law enforcement located and arrested three men about 20 miles north of Gainesville late Thursday for their role in a shooting that followed the afternoon speech by Richard Spencer. Tenbrink fired a single shot, which missed the group and struck a nearby building.
An off-duty Alachua County sheriff's deputy was on his way home from working at the Spencer speech when he began searching for and then found the Jeep, police said. Reuters journalists spoke with Tenbrink and Colton Fears ahead of the Spencer speech on Thursday. Tenbrink went on to recite the "14 words" used as a motto by white supremacists: "We must secure the existence of our people and a future for white children".
'Us coming in and saying we're taking over your town, we're starting to push back, we're starting to want to intimidate back. We don't want violence; we don't want harm.
The chants included "F**k you Spencer" and "Black Lives Matter".
Hundreds of protesters had gathered outside of the University of Florida on Thursday to protest Spencer's appearance.
As previously reported, Florida's Republican Governor Rick Scott issued a state of emergency in advance of the event to stave off potential violence. The Fears brothers are being held on $1 million bond while Tenbrink, who has a felony record, is under $3 million bond. The Gainesville Police Department reported that Tenbrink is a convicted felon, and therefore faces additional charges for possession of a firearm by a convicted felon.