Hundreds of Portland, Oregon, protesters arrested during two months of clashes with law enforcement won’t be prosecuted, the city’s district attorney announced.

Multnomah County District Attorney Mike Schmidt unveiled the policy change Tuesday regarding hundreds of the 550 protest-related arrests since late May.

Portland, Oregon, Mayor Ted Wheeler condemned the actions of rioters who he says are “attempting to commit murder."

He also warned the violent demonstrators that they are helping President Trump’s campaign.

Portland Mayor Ted Wheeler (D) on Thursday condemned the violence that recently convulsed his city, stating demonstrators are “attempting to commit murder” following an attack on East Precinct, where violent left-wing agitators attempted to set it ablaze.

“When you commit arson with an accelerant in an attempt to burn down a building that is occupied by people who you have intentionally trapped inside, you are not demonstrating, you are attempting to commit murder,” Mayor Wheeler, who has remained relatively soft on demonstrators — even joining them last month — said.

PORTLAND, Ore. (AP) — Portland’s nightly protests turned violent again even after the city’s mayor pleaded for demonstrators to stay off the streets and a police officer hit by a rock early Friday suffered what was described as a serious injury.

The protesters who came out Thursday night clashed with officers near a police precinct station and also used metal bars to disable police vehicles, police said in a statement.

Portland Mayor Ted Wheeler Thursday evening condemned the actions of rioters who attempted to set fire to a police precinct and blocked the exits while officers were inside.

“When you commit arson with an accelerant in an attempt to burn down a building that is occupied by people who you have intentionally trapped inside, you are not demonstrating, you are attempting to commit murder," Wheeler said in a news conference with Portland Police Chief Chuck Lovell.

It has been almost two months since a Los Angeles Police Department patrol car accelerated into Brooke Fortson during a protest over police violence. She still doesn’t know the name of the officer who hit her or whether that person is still policing the city’s streets. The officer did not stop after hitting Fortson and instead turned around, nearly hitting other demonstrators in the process, and sped off.

Portland recorded 15 murders in July — the most homicides in one month in more than three decades, according to a new report.

The spate in killings comes as the city winds down from more than two months of nightly protests, which often turned violent as protesters clashed with police.

So far this year, the West Coast city has seen 24 murders — the most recent on Tuesday night, when a 34-year-old woman was fatally stabbed after attending a vigil for another homicide victim, the Oregonian reported.

Viral social media posts claim that the government deployed security forces from a private firm to Portland, Oregon. One conspiracy claims that a firm called ZTi Solutions provided the agents while another suggests that the agents are employees of Blackwater (erroneously referred to as “Black River” in some posts), which was founded by Secretary of Education Betsy DeVos’s brother, Erik Prince. Some of the posts about ZTi identify Prince as the owner of the firm as well.

Scenes of billowing tear gas, burning fires and federal agents in riot gear have made Portland a national flash point and spurred debate over the authority of the federal government to respond to protests. Often missing from that debate was a full picture of what was happening on the ground.

As negotiations continue over when the agents will leave the city, here’s a look at how many recent nights of protest and confrontation have unfolded.

Cursing their inattention and debating whether they should turn around, several U.S. federal agents reportedly had driven three hours away from Portland Friday before realizing an abducted protester was still in the backseat. “Goddamnit, how did we miss him?” said federal agent Steve LaJoie to his partner after hearing muffled cries from a handcuffed man and registering that he must have been unconscious in the backseat of their unmarked vehicle for nearly 200 miles since the operatives had pulled out of Portland.