The Portland Police Bureau announced seven additional arrests were made Thursday evening amid ongoing protests at Portland State University.

The seven arrests came a couple of hours after PPB announced 22 people had been arrested on Thursday, bringing the total to 29 people arrested on Thursday.

PPB said the seven arrests were from "trespassers" breaking "back into the library" by pulling the fence down.

"Arrests have also been made for people refusing to leave the park block at the library," the bureau said in an update on X late Thursday evening.

The Portland Police Bureau said 22 arrests have been made amid the ongoing protests at Portland State University.

"PPB has arrested a total of 22 people during the events on the PSU campus," the bureau said in an update on X Thursday.

Earlier in the day, Oregon Gov. Tina Kotek released a statement condemning vandalism reported at the PSU Library.

“I fully condemn the criminal actions taken Thursday morning that resulted in the burning of 15 Portland Police Bureau cars, endangering first responders and the surrounding community," Kotek said, adding, "This includes the acts of vandalism seen this week at the Portland State University library and against nearby businesses."

The protest at Rutgers University over the Israel-Hamas war ended peacefully, the university chancellor said in a statement Thursday afternoon.

"We are pleased to report that these students have agreed to peacefully end their protest," Chancellor Francine Conway, Ph.D. said.

The deadline for students to leave the Voorhees Mall encampment was 4:00 p.m. local time.

Conway noted that the protesters' request for the university to "divest from companies engaged in Israel and to sever ties with Tel Aviv University" falls outside of the administration’s scope, however, the "divestment request is under review."

At least 209 people were arrested at UCLA after protesters resisted orders to disperse early Thursday, the LA sheriff's department has confirmed. Another 300 protesters voluntarily left campus, according to UCLA.

"Several days of violent clashes between demonstrators and counter-demonstrators put too many Bruins in harm’s way and created an environment that was completely unsafe for learning," UCLA Chancellor Gene D. Block said in a statement.

"Over the past several days, we communicated with and made a formal request to meet with demonstration leaders to discuss options for a peaceful and voluntary disbanding of the encampment. Unfortunately, that meeting did not lead to an agreement," UCLA said.

Block said the last week has been among the most painful periods the UCLA community has ever experienced.

"We will also continue to investigate the violent incidents of the past several days, especially Tuesday night’s horrific attack by a mob of instigators. When physical violence broke out that night, leadership immediately directed our UCPD police chief to call for the support of outside law enforcement, medical teams and the fire department to help us quell the violence. We are carefully examining our security processes that night and I am grateful to President Drake for also calling for an investigation," Block said.

In a letter authorizing the NYPD to enter the Columbia University campus and break up the protest, the school detailed the backstory on its recent talks with those in the encampments and the takeover Tuesday night of Hamilton Hall.

According to the letter, from Columbia President Minouche Shafik, an individual "hid in the building" at Hamilton Hall until it was closed and let others in. The group's purpose was "occupying the building," the letter read.

Two security guards were inside the building at the time, and the university said in the letter to the NYPD they were able to "secure their release."

"We believe that while the group who broke into the building includes students, it is led by individuals who are not affiliated with the University," the letter read. "The individuals who have occupied Hamilton Hall have vandalized University property and are trespassing."
Addressing the encampment on the school's Morningside campus, the university told police discussions had been carried out with group representatives, but on Sunday, they "reached an impasse."

At that time, the university says it told the group they did not have permission to "occupy spaces on campus" and were "in violation" of school rules and policies.
On Monday morning, the protesters were told they would be suspended if they didn't disperse by Monday at 2 p.m. ET.

The university said in its Tuesday night NYPD letter that those in the encampment were "suspended" and "not authorized to be on University property and are trespassing."

The university said it believed the actions of those in the protest were escalating. "These activities have become a magnet for protesters outside our gates which creates significant risk to our campus and disrupts the ability of the University to continue normal operations," the letter read.

Columbia's president concluded the letter by asking the NYPD to "help to clear all individuals from Hamilton Hall and all campus encampments."

She further asked police to have a campus presence through May 17 -- graduation is May 15 -- "to maintain order and ensure encampments are not reestablished."

Police moved onto the Columbia University campus a little before 9 p.m. ET and began making arrests.

The NYPD also used a vehicle with an extendable roof ramp to help officers breach Hamilton Hall from an upper floor. From there, the police cleared the building.

The campus encampment and hall were cleared before 11:30 p.m.

-ABC News' Jolie Lash, Aaron Katersky and Joshua Hoyos