College protests updates: Police crackdown leads to hundreds of arrests

Videos online show sprinklers were turned on where Arizona State University students set up a pro-Palestinian encampment, demanding that the university divest. Students set up their encampment on Friday.

Videos show protesters putting bags and items on top of the sprinklers to stop them from spraying.

More videos show tense interactions between students and ASU police responding to the scene. At least three individuals are seen being arrested, Phoenix ABC affiliate KNXV reported.

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