Rutgers University gave pro-Palestinian protesters a 4 p.m. deadline to clear their encampment, warning that if they do not clear the area of their tents and belongings, "they will be considered to have trespassed" and the university will clear the encampment with the help of law enforcement.

Rutgers said Students for Justice in Palestine called for a significant rally coinciding with the beginning of exam period with the intent to disrupt finals. Exams scheduled for Thursday that were disrupted by the protests were rescheduled or relocated.

"The morning rally disrupted 28 scheduled exams, impacting more than 1,000 students. While the protesters eventually responded to our request to cease their disruption, the disruption adversely impacted our students and University operations and forced our postponement announcement," President Jonathan Holloway said in a statement.

"We value free speech and the right to protest, but it should not come at the cost of our students’ education and safety. We strive to balance these rights and maintain a safe and secure environment for our students to learn and succeed," Holloway said.

Photos taken Thursday show the aftermath of police clearing a pro-Palestinian encampment at UCLA where at least 132 people were arrested.

Portland police have arrested two people outside the Portland State University campus library, as they move to clear the building, which was occupied by protesters. Police said they encountered "barricades" as they entered the building.

Individuals remaining in the building are under arrest for second-degree trespassing, police announced Thursday. The area surrounding the library has been closed off.

Police also warned that anyone resisting arrest could have force used against them and be subject to more criminal charges.

President Joe Biden addressed the nation on Thursday saying that free speech and the rule of law must both be upheld.

"We are not an authoritarian nation where we silence people or squash dissent, the American people are heard. In fact, peaceful protest is the best tradition of how Americans respond to controversial issues," Biden said, speaking from the White House.

But, he condemned the destruction of property, shutting down campuses and forcing the cancelation of classes and graduation, saying it isn't peaceful protest.

"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," Biden said.

Biden last commented on college protests on April 22 -- before there was an escalation of suspension and arrests at campuses across the country -- at the time condemning antisemitic actions and those who don't understand the plight of Palestinians in Gaza, a message he reiterated Thursday.

"There is no place for hate speech or violence of any kind whether it's anti-Semitism, islamophobia or discrimination against Arab Americans or Palestinian Americans. It’s simply wrong. There’s no place for racism in America," Biden said.

UCLA officials issued an evacuation order for all protesters in the area of Royce Quad, saying the encampment was "unlawful."

Smoke billowed around law enforcement officials as they began breaking through the barricades on the campus encampment. It was not immediately clear whether the smoke had been dispersed by the police or the protesters.

The encampment in Dickson Plaza, along with all unauthorized tents and structures, had been declared "unlawful," campus public safety officials said in an alert.

"The University requires that everyone must leave the encampment and adjacent areas, as well as all unauthorized structures and tents immediately, until further notice," the alert said.

-ABC News’ Amanda Morris and Kevin Shalvey