WATCH: Portland police rescue man set on fire by Antifa

A man can be seen emerging from the flames with both of his legs on fire. Journalists made an attempt to help but were unable to put out the fire until police officers rushed in to save the man, whose attempts to "stop, drop, and roll" had little effect on the flames.

Another angle shows four firebombs being thrown as Portland police can be heard instructing rioters to disperse. Rioters grip their shields and shout "hold the line" as fires blaze.

The gathering was declared a riot shortly after 9 p.m. as police attempted to disperse the crowd with tear gas, as Antifa threw commercial-grade fireworks, Molotov cocktails, and other projectiles at officers.

Police advanced as they announced that people must leave the area, stating their intention to use tear gas and less lethal weapons, and to make arrests if rioters did not leave the residential neighborhood.

Portland has seen 100 days of rioting calling for the disbandment of the police, whom Black Lives Matter and Antifa protestors claim are being unfairly weaponized by the city against far-left radicals.

Last week, a Trump supporter named Aaron "Jay" Danielson was hunted down and shot dead by Michael Reinoehl, a militant who provided security for Black Lives Matter events in Portland. Reinoehl described himself as "100% Antifa."

There have been dozens of arrests, though many have been released on bond. One rioter was arrested four times in four weeks.

Portland Mayor Ted Wheeler has done little to control the riots, rejecting federal help, and allowing his own building to be set on fire by Antifa militants. The mayor is reportedly moving house as a result.

Federal agents moved into the city to protect the Mark O. Hatfield federal courthouse in early July, which had been a focal point of protests. Protests erupted into riots nightly as federal officers attempted to prevent rioters from setting the building on fire. Agitators in Portland said at the time that they wanted federal officers out of their city and that it was the presence of these officers that was leading to further violence.

Officers left at the end of July, and these nightly riots have not abated. In July, Wheeler attended a riot, and heard the demands of the protestors. They were that the police be defunded by 50 percent, that protestors be released from jail, that the federal officers leave the city, and that Wheeler should resign.

The Portland City Council voted to defund the police by $15 million. Protestors continue to be released on bond after arrest, and the federal officers have left the city. Wheeler's opposition candidate, Sarah Iannarone, has stating that she is pro-Antifa because "it's good to oppose fascism."