A total of 34 people were arrested while emptying a pro-Palestinian encampment at University of Wisconsin-Madison Wednesday, the university said.

The majority of those arrested have been released with no citation issued, but four people have been booked, according to the university. The charges they are facing include attempted disarming a police officer, resisting arrest, attempted escape and battery to a police officer.

Four police officers were injured at the University of Wisconsin-Madison where police were dispersing an encampment of protesters on the Library Mall.

Three of the four officers sustained injuries "directly related to the physical resistance," according to the university. A state trooper sustained injuries when a protester allegedly "struck their head with a skateboard."

Columbia University President Minouche Shafik said that tensions on campus had "rose to new heights" when a group of protesters broke into Hamilton Hall and barricaded themselves. Shafik said it pushed the university "to the brink," according to a letter sent to the Columbia University community Wednesday.

"I know I speak for many members of our community in saying that this turn of events has filled me with deep sadness. I am sorry we reached this point," Shafik said.

The NYPD said it arrested 119 people at Columbia Tuesday night, but it has not yet revealed how many of those arrested are students.

"The University offered to consider new proposals on divestment and shareholder activism, to review access to our dual degree programs and global centers, to reaffirm our commitment to free speech, and to launch educational and health programs in Gaza and the West Bank. Some other universities have achieved agreement on similar proposals. Our efforts to find a solution went into Tuesday evening, but regrettably, we were unable to come to resolution," Shafik said.

Negotiations broke down between the university and members of the encampment after Columbia refused to divest from companies linked to Israel and the war in Gaza.

The University of California, Los Angeles announced that it will cancel all Wednesday classes due to the "distress caused by the violence that took place on Royce Quad" overnight, according to a statement from the university.

The hospital and health system, the Luskin Conference Center and PreK through 12 schools will remain open.

"We have law enforcement presence stationed throughout campus to help promote safety. Student Affairs will have essential staff on campus to support our students who have been impacted by this tragedy," UCLA said in a statement.

Northwestern University announced it has reached a deal with pro-Palestinian protesters, ending an encampment of students and faculty, but allowing peaceful demonstrations to continue through June 1.

The university said it would "answer questions from any internal stakeholder about holdings, held currently or within the last quarter, to the best of its knowledge and to the extent legally possible" -- meeting a key call from divestment protesters and students around the country who are seeking more transparency over universities' investments.

Northwestern will also reestablish an Advisory Committee on Investment Responsibility in the fall, which will include representatives from students, faculty and staff.

The university also pledged more inclusivity, funding two Palestinian faculty members and the full cost of attendance for five Palestinian undergraduate students annually, as well as a commitment to raising funds to sustain the program beyond this commitment.

Under the agreement, Northwestern says tents will be removed immediately but one aid tent will be allowed to remain. Protesters will need to suspend the use of "non-approved" amplified sound." Protesters who refuse to follow the agreement will be suspended and non-affiliated individuals must leave campus.