In a message to the campus community Monday, Massachusetts Institute of Technology President Sally Kornbluth gave students until 2:30 p.m. to leave the encampment on campus.

However, protesters remained in the area until after the deadline. It's unclear if police will move in and make arrests.

"In short, this prolonged use of MIT property as a venue for protest, without permission, especially on an issue with such sharp disagreement, is no longer safely sustainable," Kornbluth said.

The encampment on MIT’s campus, on the Kresge lawn, has been ongoing for more than two weeks, according to Kornbluth.

Police moved in on an encampment at the University of California, San Diego early Monday morning, dismantling it and arresting 64 people, according to authorities.

There were 40 students among those arrested, with officials saying they "have been or will be placed under immediate interim suspension."

All classes were moved to remote learning and nonessential personnel were asked to remain home.

Several dozen protesters were detained on UCLA’s campus Monday morning, according to Los Angeles ABC station KABC.

University officials said all classes would be held remotely Monday “due to ongoing disruptions,” and police would be stationed around campus.

Harvard University students who continue to take part in the pro-Palestinian protest encampment at the school will be “referred for involuntary leave,” the university’s interim president, Alan M. Garber, said Monday.

In a letter to the student body, Garber called on protesters “to end the occupation of Harvard Yard,” arguing that the encampment “favors the voices of a few over the rights of many who have experienced disruption in how they learn and work at a critical time of the semester.”

Students placed on involuntary leave “may not be able to sit for exams, may not continue to reside in Harvard housing, and must cease to be present on campus until reinstated,” he wrote.

“As an academic institution, we do not shy away from hard and important questions,” Garber wrote. “There are many ways for our community to engage constructively in reasoned discussion of complex issues, but initiating these difficult and crucial conversations does not require, or justify, interfering with the educational environment and Harvard’s academic mission.”

-ABC News' Julia Reinstein

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