Fire spree in Ore. protest

Violent Portland protests were again declared a riot Monday night as demonstrators tried to torch a police-union building while chanting, “Burn it down!”

Around 300 people — many wearing shields, gas masks and body armor — stormed the Portland Police Association building as rocks were thrown at officers, according to police.

“Power to the building was cut and flames were seen shooting up the side of the building,” the Portland Police Bureau said — just a night after a fire had been set at a station house late Sunday.

The union office is “located on the edge of a residential area with wood-frame houses” and the “dry summer weather exacerbated the fire danger,” the force said.

“Due to the extreme life safety concerns, the incident commander determined that it was a riot,” police added.

“The urgency to extinguish the fire was extreme,” the bureau continued. “Someone in the crowd appeared to pour some kind of accelerant on it as the fire exploded rapidly.”

Someone had also climbed up to unfurl a banner over the building, which was tagged with anti-police graffiti, The Oregonian reported.

At least two fires were eventually set there, while others were later set in the streets once the rioters were finally cleared from the union HQ.

At least 25 people were arrested — while more than 100 real crime victims did not get the immediate help they needed because of the “severely limited response” from so many deployed to the riots, according to police.