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

Columbia University has distributed a letter to members of the encampment on campus telling them to gather their belongings and leave the area by 2 p.m., saying if they identify themselves and sign a form "to abide by all University policies through June 30, 2025, or the date of the conferral of your degree, whichever is earlier, you will be eligible to complete the semester in good standing."

The school said it has "already identified many students in the encampment" and "if you do not identify yourself upon leaving and sign the form now, you will not be eligible to sign and complete the semester in good standing." The school warned it could take action up to suspension or expulsion if they do not leave the encampment.

The school reiterated that negotiations with protesters had broken down and said the protests are a "disruption" to those taking final exams and preparing for graduation.

"As you are probably aware, the dialogue between the University and student leaders of the encampment is, regrettably, at an impasse," the letter states. "The current unauthorized encampment and disruption on Columbia University’s campus is creating an unwelcoming environment for members of our community. External actors have also contributed to this environment, especially around our gates, causing safety concerns – including for our neighbors."