Outside anti-ICE agitators have traveled across the country to stoke violence outside Delaney Hall — the embattled immigration detention center in New Jersey, officials said Monday.

Homeland Security Secretary Markwayne Mullin made the revelation on Monday, saying that hooligans from as far away as Portland, Oregon, have wreaked havoc outside the Newark facility.

Twenty-one protesters were arrested for allegedly assaulting federal officers outside Delaney Hall between May 26 and May 29. At least another 20 were arrested on Sunday alone.

Mullin on Monday praised the New Jersey state police after the state reluctantly dispatched officers to help the feds reign in the unruly mob after a week of anarchy.

“We see over and over again in these sanctuary cities and sanctuary states where law enforcement officers, they want to do their job, that’s why they signed up to do their job. So often, you have radical left leadership that doesn’t allow them to do so,” Mullin said at a press conference on Monday.

“But when they did show up [at Delaney Hall], they quickly realized these aren’t peaceful protesters that the radical left politicians were telling you about,” he added.

Mullin called the protesters “well-organized” and “well-supplied” — hours after federal officers tore down a volunteer camp stocked with supplies intended for detainees’ families and loved ones.

Portland has seen repeated anti-ICE demonstrations since June 2025. Protests flared monthly since then, and in March, one dim-wit accidentally set himself on fire while trying to burn an American flag outside a city immigration facility.

Mullin didn’t identify any other states the agitators may have traveled from, or how many have been arrested in total. The Post reached out to DHS for more information.

So far, at least two agitators, both native to the tristate area, have been charged for their alleged misconduct.

Brendan John Geier, a 26-year-old from Madison, New Jersey, allegedly sank his teeth into federal law enforcement officers during a demonstration last week. He was previously accused of distributing child pornography while he was in college.

Nicholas Matthew Scelfo, a 27-year-old Brooklynite, was charged for allegedly threatening to kill an agent and his family during a heated confrontation at Delaney Hall on May 27.

“I’ll kill your whole f–king family. Your whole f–king family is dead. Your children, your wife, all dead,” the agitator was heard shouting at federal agents in video footage captured by witnesses.

“I have your face, motherf–ker. You’re dead. Dead,” he added.