The University of Virginia alerted students to avoid the chapel area of the school's Charlottesville campus -- where protesters have set up an encampment -- for police activity.

Around 40 police officers from multiple police agencies are on campus to potentially clear pro-Palestinian protesters, according to the student paper, the Cavalier Daily.

Albemarle County Police and Virginia State Police arrived with riot gear to support Charlottesville Police and University Police, according to an affiliate reporter.

The University of California Los Angeles announced classes are "expected to resume in full on Monday," in an update Friday evening.

"Campus operations will be limited through the weekend, and are expected to resume in full on Monday. Classes continue remote through the weekend. Work, events and research activities are encouraged to remain remote or be rescheduled wherever possible during that period," UCLA said in a statement.

A law enforcement presence will continue "to be stationed around campus to help promote safety," the university said.

Linda G. Mills, the president of NYU, posted a statement Friday evening explaining why the school called in the NYPD to break up an encampment on the Greene St. Walkway earlier in the day.

Mills said 14 people who refused orders to leave the area were arrested and the incident was non-violent.

The president said that the police were called in for numerous reasons, including noise complaints from nearby residents and businesses, safety concerns over the crowds of supporters and counter-protesters and escalating threats.

"The encampment had become increasingly untenable for the NYU community and the neighborhood we inhabit," she said.

Mills said three senior administrators spoke with the protesters over the weekend to come to an agreement over shutting down the encampment.

The president said things escalated on Wednesday when a group of people from a May Day march came to the walkway and got into altercations.

The May Day incident and other issues, including threats leveled at NYU administrators, led the school to call the NYPD, according to Mills.

"The university’s senior leadership and I were compelled to conclude that we could not tolerate the risk of violence any longer and that we could not responsibly or in good conscience wait until something drastically worse were to happen in order to act. We needed to bring this to a close," she said.

Footage from the University of Mississippi campus captures intense confrontations between pro-Palestinian protesters and counter-protesters.

The dozens of pro-Palestinian protesters gathered on the campus to call for divestment from military operations in Gaza and for the university to condemn what they call "genocide."

Footage shows a much larger counter-protest surrounding the students, with many donning American flags.

Protesters reported being subject to racism and violent threats and having food thrown at them by counter-protesters.

In one video, a Black protester can be seen recording and speaking to counter-protesters, moving past the protective barricades around pro-Palestinian protesters.

Law enforcement officers can be seen urging her to walk back as counter-demonstrators taunt her, including on student making a monkey impersonation and others chanting "lock her up," according to the Stacey Spiehler, who took the video.

Law enforcement also urged counter-protesters to stand back.

Jacob Batte, Ole Miss’ director of news and media relations, told ABC News they "cannot comment specifically about that video," but that "statements were made at the demonstration on our campus Thursday that were offensive and inappropriate."

The university said it is looking into reports about specific actions and "any actions that violate university policy will be met with appropriate action."

In a statement following the confrontations, protesters said they were met with "blind reactionism that had little to do with the genocide we were protesting as well as our demands."

-ABC News' Chris Looft and Kiara Alfonseca

University of California President Michael V. Drake addressed the ongoing protests at UCLA that "turned violent" overnight, announcing in a statement on Wednesday an "independent external review" has been ordered.

The university summoned mutual aid from LAPD officers to "restore control" to the protest, according to Drake, who noted, there were 15 injuries, including one hospitalization, that stemmed from the protest.

"My office has requested a detailed accounting from the campus about what transpired in the early morning hours today," Drake said.

"But some confusion remains, therefore we are also ordering an independent external review of both UCLA’s planning and actions, and the effectiveness of the mutual aid response," Drake said.

UCLA's own chancellor, Gene D. Block, also promised an investigation.

"We are still gathering information about the attack on the encampment last night, and I can assure you that we will conduct a thorough investigation that may lead to arrests, expulsions and dismissals," Block told the campus community in a note Wednesday afternoon.

Block, in his note, said it was "a group of instigators" who came to Royce Quad to "forcefully attack the encampment that has been established there to advocate for Palestinian rights."

He called the overnight violence "utterly unacceptable."

"However one feels about the encampment, this attack on our students, faculty and community members was utterly unacceptable. It has shaken our campus to its core and — adding to other abhorrent incidents that we have witnessed and that have circulated on social media over the past several days — further damaged our community’s sense of security," his letter read.