More than 100 people were arrested and four police officers were injured early Thursday when Boston police moved to clear a pro-Palestinian encampment at Emerson College. It is one of several set up by students at Massachusetts colleges including Massachusetts Institute of Technology and Harvard University.

Three of the officers suffered minor injuries and a fourth officer suffered more serious injuries, according to Boston police.

None of the protesters in custody have reported injuries, according to police. The protesters will be arraigned at Boston Municipal Court.

Police arrested 93 people on and around the University of Southern California campus, mostly on misdemeanor trespass Wednesday night.

The university declared the campus closed in the afternoon, open only to students with their USC IDs at pedestrian gates, due to what USC said "significant activity at the center of campus."

On Wednesday night, LAPD Captain Kelly Muniz told ABC News that around 35 protesters had been processed for misdemeanor trespass. Several dozen more were waiting to be processed, Muniz said.

There was an altercation in one portion of the protest area that resulted in one arrest for assault with a deadly weapon, according to Muniz.

There are no known injuries to police or protesters.

The scene will be cleared some time tonight., Muniz said.

-ABC News' Marilyn Heck

At least 34 people had been arrested at the University of Texas at Austin as of 9 p.m. local time, according to the Texas Department of Safety.

"Today, our University held firm, enforcing our rules while protecting the Constitutional right to free speech. Peaceful protests within our rules are acceptable," University President Jay Hartzell said in a statement Wednesday evening.

"Breaking our rules and policies and disrupting others’ ability to learn are not allowed. The group that led this protest stated it was going to violate Institutional Rules. Our rules matter, and they will be enforced. Our University will not be occupied."

"There is a way to exercise freedom of speech and civil discourse, and our Office of the Dean of Students has continued to offer ways to ensure protests can happen within the rules," Hartzell continued.

The dispersal order ended shortly after 9 p.m. and the campus was deemed "all clear," Austin Police said on X.

Campus police have issued a dispersal order at the University of Southern California amid ongoing protests over the Israel-Hamas war.

LAPD officers have surrounded Alumni Park on campus, and while much of the crowd has dispersed, an estimated group of 50 protesters remain in the park.

In an update shared on X Wednesday evening, the university’s Department of Public Safety said, "If you are in the center of campus, please leave; LAPD will be arresting people who don’t disperse."

At least 20 people have been arrested at the University of Texas at Austin, according to the school.

“UT Austin does not tolerate disruptions of campus activities or operations like we have seen at other campuses," the UT Division of Student Affairs said in a statement. "This is an important time in our semester with students finishing classes and studying for finals and we will act first and foremost to allow those critical functions to proceed without interruption."

The University of Texas at Austin's Office of the Dean of Students sent a letter to the Palestine Solidarity Committee Tuesday night saying the protest was not allowed to take place.

"The Palestine Solidarity Committee student organization's event 'Popular University for Gaza,' which is planned for tomorrow, has declared intent to violate our policies and rules, and disrupt our campus operations. Such disruptions are never allowed and are especially damaging while our students prepare for the end of the semester and final exams. For these reasons, this event may not proceed as planned," the letter, obtained by ABC News, stated.