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."

Protesters at Columbia University, who sparked many of the protests across the nation earlier this month, are now being asked to voluntarily disperse after the school's president said it was not able to come to an agreement through negotiations.

Since Wednesday, "a small group of academic leaders has been in constructive dialogue with student organizers to find a path that would result in the dismantling of the encampment and adherence to University policies going forward. Regretfully, we were not able to come to an agreement," Columbia President Minouche Shafik said in a statement Monday morning.

One of the top demands of the protesters, for Columbia to divest from Israel, was flatly denied by the university, according to the statement.

The school asked protesters, who number in the hundreds, to voluntarily disperse, but offered no explanation for what would happen if they did not. The school said it did not "want to deprive thousands of students and their families and friends of a graduation celebration." The school's graduation ceremony is set to be held May 15.

"We urge those in the encampment to voluntarily disperse," Shafik wrote. "We are consulting with a broader group in our community to explore alternative internal options to end this crisis as soon as possible. We will continue to update the community with new developments."

Police cleared out an encampment at Virginia Tech late Sunday after protesters had set up tents on the lawn of the campus' Graduate Life Center.

"Those who gathered were advised by university officials to remove their possessions and to disperse voluntarily; those who failed to comply were then approached by Virginia Tech Police and were again asked to leave and advised that anyone who failed to comply would be charged with trespassing, in accordance with Virginia law," the school said in a statement.

The university added, "At approximately 10:15 p.m., police approached protesters to ask them to disperse within five minutes. Those who remained were subject to arrest."

Dozens of protesters were taken into custody, according to Lynchburg, Virginia, ABC affiliate WSET.

UCLA announced it is instituting additional security measures amid protests on campus over the Israel-Hamas war in a statement on Sunday.

"UCLA has a long history of peaceful protest and we are heartbroken to report that today, some physical altercations broke out among demonstrators on Royce Quad," Mary Osako, vice chancellor of UCLA Strategic Communications said.

"We have since instituted additional security measures and increased the numbers of our safety team members on site," Osako said.

"As an institution of higher education, we stand firmly for the idea that even when we disagree, we must still engage respectfully and recognize one another’s humanity," Osako continued.

Addressing the physical altercations during the protests, Osako said, "We are dismayed that certain individuals instead chose to jeopardize the physical safety of the community."

Last week, the University of California rejected calls to divest from companies that do business with Israel.

After police and protesters clashed on the campus of the University of Texas at Austin following a dispersal order, leading to some arrests on Monday, the school issued a statement, saying it "took swift action to preserve a safe, conducive learning environment for our 53,000 students as they prepare for final exams."

"UT Austin requested backup assistance from the Texas Department of Public Safety to protect the safety of the campus community and enforce our Institutional Rules, such as the rule that prohibits encampments on campus. Because of the encampments and other violations of the University’s Institutional Rules related to protests, protestors were told repeatedly to disperse. When they refused to disperse, some arrests were made for trespassing. Others were arrested for disorderly conduct," the university's statement read.

UTA said protests since the start of the Israel-Hamas war have happened "largely without incident."

"The University strongly supports the free speech and assembly rights of our community and we want students and others on campus to know that protests on campus are fully permissible, provided that they do not violate Institutional Rules or threaten the safety of our campus community," the statement concluded.

-ABC News' Marilyn Heck