Four of the protesters arrested at pro-Palestinian demonstrations at Columbia University and City College of New York are "outside protest influencers," not students at the schools, a senior law enforcement official said.

All four have been charged with burglary and illegal entry, the official said. They are:

James W. Carlson, whom the official described as "a long-time figure in the anarchist world" with multiple aliases, like Cody Tarlow and Cody Carlson.

Citing California arrest records, the official said Carlson was arrested in 2005 during the violent G8 protests in San Francisco for he attacked a police officer. He was charged with "suspicion of attempted lynching, malicious mischief, battery to a police officer, aggravated assault on a police officer with a deadly weapon and willful resistance to a police officer that results in serious bodily injury."

The official did not say whether Carlson was convicted or served any time.

Carlson has also been suspected of burning an Israeli flag during a demonstration, and he was "previously involved in recent bridge and tunnel blocking," said the official, who gave no further specifics.

Amelia Fuller was arrested near CCNY.

Previously, Fuller had been arrested on Jan. 8 for taking part in a pro-Palestinian protest to blockade the Williamsburg Bridge, which connects Manhattan to Brooklyn.

The New York Botanical Garden also fired Fuller, the official said, after she appeared in a video allegedly declaring that she felt "proud" after Hamas staged the Oct. 7 massacre of Israelis that sparked the Gaza War.

The Botanical Garden did not immediately respond to a request for confirmation.

Jacob Issac Gabriel, who was also arrested near CCNY, and has had "numerous protest-related arrests," the official said.

Gabriel, the official said, was part of a group that disrupted the Macy’s Thanksgiving Day Parade last year.

Rudy Ralph Martinez, who was arrested near CCNY, "has an extensive history of protest-related arrests dating back to California in 2012," the official said.

Twelve protesters were arrested after police rousted them from the library at Portland State University, police in Portland, Oregon, reported on social media.

They were part of a larger group that had taken over the library and barricaded the doors in anticipation of a standoff, the police bureau said.

"We have found caches of tools, what appears to be improvised weapons, ball bearings, paint balloons, spray bottles of ink, and DIY armor," police posted on X. "None of this was used on police."

LOS ANGELES — It was a chaotic scene outside the Twin Towers jail this morning as UCLA protesters and counterprotesters who were arrested overnight were being processed.

The streets around the downtown jail were closed and a crowd was gathered outside the jail, chanting, "Free, free Palestine!" Every time an arrestee came out of the center, the crowd would clap and cheer. They were being cited and released.

A business owner across the street said the crowd began gathering around 9 a.m.

Some UCLA faculty members had also come to the reception center to show their support for their students.

At the jail's inmate reception center, many young people who appeared to be college age stood outside with tickets in hand. The crowd erupted in cheers every time someone stepped outside.

Some of those arrested came out in tears.

Los Angeles County public defenders and National Lawyers Guild attorneys also arrived to offer legal help.

Volunteers passed out bagels, tamales, water and other snacks to those arrested.

California Highway Patrol officers have now arrested 209 protesters at UCLA, two law enforcement sources apprised of the ongoing operation to clear the campus said.

And the cost to remove the pro-Palestinian encampment, an action that began with a predawn raid, has climbed into the "multiple millions of dollars" range, the sources said.

It was not immediately clear how many of those arrested were UCLA students or faculty members or whether any outsiders were swept up in the raid, the sources said.

That information may not be known for days, they said.

Most are expected to be slapped with misdemeanor trespassing or vandalism charges before they are released, the sources said. Some could face more serious assault and battery charges stemming from attacks on police officers.

Prosecutions of misdemeanors are generally handled by the Los Angeles city attorney, the sources said, but it’s possible some of more serious cases will be prosecuted by the Los Angeles County district attorney and the state attorney general.

After Biden wrapped up his remarks this morning, a reporter asked if the protests have caused him to reconsider his policies in the Middle East region, to which the president replied, “No.”

When asked if the National Guard should intervene, he also said, “No,” before walking out of the Roosevelt Room. 

So far, there have been at least 2,138 arrests at college protests across the country, according to an NBC News tally.

The arrests came from at least 60 colleges and institutions participating in protests and encampments in solidarity with the Palestinian cause and calling for their schools to divest from Israel.

Some of the latest numbers include:

• Twelve arrested at the University of New Hampshire last night — 10 students and two who are not affiliated with the university — all charged with disorderly conduct and trespassing. 
• Four arrested at Yale last night — two students and two non-students, charged with criminal trespass and disorderly conduct.
• Twenty-nine arrested at Stony Brook University shortly after midnight — 22 students, two faculty members and five others for "violating various laws." 

The Columbia University chapter of the American Association of University Professors called for a vote of no confidence in President Minouche Shafik following the “horrific police attack on our students.”

In a statement this morning, members said they “unequivocally condemn” Shafik’s decision to call in the NYPD to clear out Hamilton Hall and encampment protests — a move they said was made without consulting the University Senate, “in violation of established procedures, by recourse to so-called emergency powers.”

She did so, in the face of efforts by the AAUP and faculty to “de-escalate the situation.” The statement noted that faculty, staff and students were locked out of campus prior to the police raid, and remain so. 

“The choice of Columbia’s administrators to ignore University statutes and customary practices honored over the past six decades, to have our students violently arrested, and to impose a militarized lockdown of our campus, has irrevocably undermined our trust in them,” the statement said.

In contrast, the chapter noted how Brown University had agreed to start a process with students to bring protester demands before their Board of Trustees, which resulted in the “peaceful disbanding of that encampment.”

The chapter called for the University Senate and representative faculty bodies of individual schools to pass a vote of no confidence in Shafik, the co-chairs of the Board of Trustees and the COO, demanded campus be immediately reopened and the NYPD withdrawn “at once.” 

“A vote of no confidence in the President and her administration is the only way to begin rebuilding our shattered community and re-establishing the University’s core values of free speech, the right to peaceful assembly, and shared governance.”

Biden addressed the protests that have roiled U.S. college campuses in recent weeks, saying: "Let me be clear: peaceful protest in America. Violent protest is not protected — peaceful protest is. It's against the law when violence occurs."

"There's the right to protest, but not the right to cause chaos," the president added.

He noted that destroying property, vandalism, breaking windows, shutting down campuses and forcing the cancellation of classes and graduation are not peaceful protests.

"Threatening people, intimidating people, instilling fear in people is not a peaceful protest. It's against the law," he said. "Dissent is essential to democracy, but dissent must never lead to disorder or to denying the rights of others so students can finish the semester and their college education," he continued.

"There should be no place on any campus, no place in America for antisemitism or threats of violence against Jewish students. There’s no place for hate speech or violence of any kind whether it’s antisemitism, Islamophobia or discrimination against Arab Americans or Palestinian Americans," Biden said. "It’s simply wrong. There’s no place for racism in America."

One day after clashes between protesters and police culminated in arrests, 25 tents were re-established at the University of Wisconsin-Madison.  

At least two police officers in regular uniform were seen surveying the area from a distance.  

This morning, the chancellor is meeting with a few protest leaders, but protesters say they’ll only be satisfied when they have confirmation the university will take action on their demands including divestment, cutting ties with Israeli institutions and calling for a cease-fire.

“I think our concerns with any agreement that we come to is that we want to make sure that the agreement results in our demands actually being met, not just our demands being subject to further discussion by the administration,” Dahlia Saba, a first-year graduate student in engineering and encampment participant, told NBC News. 

Yesterday, at least 34 people were arrested. While a majority were released, four were booked into Dane County Jail on charges spanning battery to a police officer and resisting arrest, the UW-Madison Police Department said. Four police injuries were reported in the confrontation with protesters.