UCLA's public safety department said in an alert Wednesday night that all on campus classes were "required to pivot to remote" through the end of the week.

The announcement comes after overnight protests turned violent, injuring 15 and sending one person to the hospital, university officials previously confirmed.

Campus operations will be limited on Thursday and Friday, the public safety department said in its evening update.

"We have a large law enforcement presence stationed throughout campus to help promote safety," the department said. "Student Affairs will have essential staff on campus to support our students."

Police at UCLA have announced to the gathered crowd that the encampment on campus is an "unlawful gathering."

Demonstrators have been ordered to leave by the LAPD, according to KABC 7.

UCLA is broadcasting a message of its own, telling protesters to disperse. The message, which appears to be recorded, says those who don't leave will be subject to administrative action.

During a press conference on Wednesday evening, student protestors from Columbia University and City University of New York responded to the intervention of the NYPD to dismantle encampments and suspend and arrest hundreds of protesters across both universities last night and today.

"We will not stop fighting. This is just the beginning," Cameron Jones of Columbia’s Justice for Palestine chapter said.

Corinna Mullin, a member of CUNY faculty, joined the press conference and called the students "brave" and said that the administration actions against its own students was "shameful."

The students from Columbia and CUNY vowed to continue their efforts, saying, "The more they will try to silence us, the louder we will be."

-ABC News' Camilla Alcini

After authorizing NYPD officers to move on the Fordham University to clear an "unlawful encampment" in a campus building on Wednesday, the institution said 15 individuals were arrested for misdemeanor trespassing.

In a statement Wednesday evening, Fordham University said several dozens of people pushed inside the lobby of the Lowenstein building and set up tents.

Most individuals left the encampment after "threats of conduct sanctions" but the remaining 15 people were arrested, according to the statement, which notes, "We believe some of those were Fordham students."

"We met with student leaders as recently as yesterday, readily agreeing to allow them to present their case about divestment and transparency to trustees and our chief investment officer," the university said, adding, "We remain committed to that process."

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.