The lead student negotiator with a Columbia University student group organizing the encampment says there is no longer a "deadline" for them to leave, but more of a "timeline."

The group -- Columbia University Apartheid Divest group -- says negotiations with the university remain ongoing and another decision will be made at 5 p.m.

"We have until 5 p.m. to come up with a plan," the Columbia student negotiator said.

-ABC News' Stephanie Ramos

Congresswoman Alexandria Ocasio-Cortez, D-N.Y., visited student protesters at Columbia University Friday.

Hundreds of counterprotesters also gathered near Columbia's campus on Friday morning waving Israeli flags and calling for the release of hostages held in Gaza.

Ocasio-Cortez has criticized the university's decision to arrest students.

"Not only did Columbia make the horrific decision to mobilize NYPD on their own students, but the units called in have some of the most violent reputations on the force. NYPD had promised the city they wouldn’t deploy SRG to protests. So why are these counterterror units here?" Ocasio-Cortez said on X Wednesday.

In another post, she called the arrests a "dangerous" act.

"Calling in police enforcement on nonviolent demonstrations of young students on campus is an escalatory, reckless, and dangerous act. It represents a heinous failure of leadership that puts people’s lives at risk. I condemn it in the strongest possible terms," Ocasio-Cortez said on X.

Students were arrested and charged with trespass at Ohio State University after refusing to leave a pro-Palestinian encampment late Thursday.

"Well established university rules prohibit camping and overnight events. Demonstrators exercised their first amendment rights for several hours and were then instructed to disperse. Individuals who refused to leave after multiple warnings were arrested and charged with criminal trespass," the university said in a statement to ABC News.

Videos show protesters chanting and tussling with officers outside the Ohio State University student union building. In another video, police can be heard issuing a loudspeaker warning to a dispersing crowd at OSU as a helicopter flies overhead.

Another video shows an officer tackling someone to the ground as other officers force people back and another person falls to the ground.

-ABC News' Matthew Holroyd and Ahmad Hemingway

Columbia University sent a message to the community late Thursday night, saying discussions with student protesters are "ongoing."
"The talks have shown progress and are continuing as planned," Columbia said in its message.

"For several days, a small group of faculty, administrators, and University Senators have been in dialogue with student organizers to discuss the basis for dismantling the encampment, dispersing, and following University policies going forward," the message continued. "We have our demands; they have theirs. A formal process is underway and continues."

-ABC News' Ahmad Hemingway

Andrew T. Guzman, the provost and senior vice president for Academic Affairs at the University of Southern California, sent a letter to the school's students, faculty and other members with an update on the situation taking place on campus.

Guzman reiterated the university "values freedom of expression and protects the right of every member of our community to express themselves," but added, "We have well-established policies regarding limits on the time, place, and manner of free expression."

Guzman said the call to shut down the campus stemmed from a confrontation between protesters outside the Doheny Library and security. Security members asked the protesters, many of whom Guzman said weren't affiliated with USC, to leave and remove tents they set up, but the protesters refused, according to the school.

"Their actions have escalated to the point of confrontation and have threatened the safety of our officers and campus community," Guzman said.

Until further notice, only people with "USC identification or verifiable business purpose will be able to access campus, attend classes, and participate in activities" will be allowed on campus, according to Guzman.

"In these challenging times, we call on the Trojan Family to remember that every member of our community is deserving of respect, has the right to be safe on campus, take classes, and participate in other campus activities without fear of harassment or bullying. It should be everyone’s priority to treat each other with kindness and care," he said.

-ABC News' Jenna Harrison