Cheryl Elliott, Emory University's vice president for public safety, provided an update to the school community on the incident that took place between police and pro-Palestinian protesters.

Elliot addressed the viral video of officers using a stun gun on one of the protesters when the encampment was dispersed and said the person in the video did not appear to be affiliated with Emory.

"Based on current information, this individual is not a member of the Emory community," Elliot said.

Elliot said, "Due to the direct assault of officers, law enforcement released chemical irritants into the ground to assist with crowd control."

Twenty-eight people were arrested during the incident, 20 of whom were affiliated with the university, according to Elliot.

"We are working with responding agencies to expedite the release of any Emory community members who remain in custody," she said in her letter to the Emory community.

-ABC News' Cherise Rudy

Columbia University said it is enhancing security along the campus' perimeter after it was made aware of several "potentially significant" protests planned outside the gates of its Manhattan campus Thursday evening.

The New York City Police Department is adding officers "to maintain safety" and people are being asked to avoid the area, the university said in a message to the school community. The protests are expected to start around 6 p.m. ET., it said.

The campus remains restricted to Columbia University ID holders.

The university is in formal discussions with student protesters regarding dismantling an encampment on campus, a university spokesperson said.

Demonstrators who were arrested Wednesday at the University of Texas will not be facing charges at this time and have been ordered released due to deficiencies in probable cause, according to the Travis County Attorney’s Office.

Fifty-five people were arrested -- 26 of whom were unaffiliated with UT Austin -- the university said Thursday.

"This outside group presence is what we've seen from the affiliated national organization's efforts to disrupt and create disorder," the university said in a statement.

The attorney's office said it received several cases Wednesday after the demonstration at UT Austin.

"Legal concerns were raised by defense counsel. We individually reviewed each case that was presented and agreed there were deficiencies in the probable cause affidavits. The Court affirmed and ordered the release of those individuals. We will continue to individually review all cases presented to our office to determine whether prosecution is factually and legally appropriate," the Travis County Attorney's Office said in a statement.

Northeastern University in Boston said it will "take action accordingly" against pro-Palestinian protesters demonstrating on its Centennial Quad on Thursday.

"The quads on Northeastern's Boston campus are reserved by the division of Student Life for scheduled university events," a university spokesperson said in a statement. "Students currently demonstrating on Centennial Quad do not have authorization and are in violation of the Code of Student Conduct. Those who are not affiliated with Northeastern are trespassing. The university will take action accordingly."

Northeastern University has removed an encampment of pro-Palestinian protesters, with police detaining about 100 people. The university says students who produced valid Northeastern ID were released and will face disciplinary proceedings within the university.

"Earlier this morning the Northeastern University Police Department -- in cooperation with local law enforcement partners - began clearing an unauthorized encampment on the university's Boston campus. What began as a student demonstration two days ago was infiltrated by professional organizers with no affiliation to Northeastern. Last night, the use of virulent antisemitic slurs including "Kill the Jews," crossed the line. We cannot tolerate this kind of hate on our campus," the university said in a statement.

The university added, "As part of clearing the site, approximately 100 individuals were detained by police. Students who produced valid Northeastern ID were released. They will face disciplinary proceedings within the university, not legal action. Those who refused to disclose their affiliation were arrested."

Massachusetts State Police said they responded to Northeastern's request for assistance removing protesters.

"Officers directed protesters to disperse and MSP members assisted in removing protesters who refused to leave. Approximately 102 protesters who refused to comply with orders to disperse were arrested and will be charged by NUPD with trespassing and disorderly conduct. They are being transported to the Suffolk County House of Correction to be booked and processed," MSP said in a statement.