NEW YORK — Pro-Palestinian protesters that had been blocked by police from accessing an encampment at the Massachusetts Institute of Technology on Monday broke through fencing, linked arms and encircled tents that remained there, as Columbia University canceled its university-wide commencement ceremony following weeks of demonstrations.

Sam Ihns, a graduate student at MIT studying mechanical engineering and a member of MIT Jews for a Ceasefire, said the group has been at the encampment for the past two weeks and that they were calling for an end to the killing of thousands of people in Gaza.

“Specifically, our encampment is protesting MIT’s direct research ties to the Israeli Ministry of Defense,” he said.

Protesters also sat in the middle of Massachusetts Avenue, blocking the street temporarily during rush hour in the Boston area. By evening the atmosphere around the MIT protest grew less tense with protesters listening to speeches and joining chants before taking a pizza dinner break.

Police in large part had pulled back from the encampment after offering a more robust presence earlier in the day. An MIT spokesperson said the fencing was breached after the arrival of demonstrators from outside the university and that no arrests had been made by Monday night.

The demonstrations at Columbia have roiled its campus and officials said Monday that while it won’t hold its main ceremony, students will be able to celebrate at a series of smaller, school-based ceremonies this week and next.

The decision comes as universities around the country wrangle with how to handle commencements for students whose high school graduations were derailed by COVID-19 in 2020. Another campus shaken by protests, Emory University, announced Monday that it would move its commencement from its Atlanta campus to a suburban arena. Others, including the University of Michigan, Indiana University and Northeastern, have pulled off ceremonies with few disruptions.

Columbia’s decision to cancel its main ceremonies scheduled for May 15 saves its president, Minouche Shafik, from having to deliver a commencement address in the same part of campus where police dismantled a protest encampment last week. The Ivy League school in upper Manhattan said it made the decision after discussions with students.

“Our students emphasized that these smaller-scale, school-based celebrations are most meaningful to them and their families,” officials said.

Most of the ceremonies that had been scheduled for the south lawn of the main campus, where encampments were taken down last week, will take place about 5 miles north at Columbia’s sports complex, officials said.

Speakers at some of Columbia’s still-scheduled graduation ceremonies include Pulitzer Prize-winning playwright James Ijames and Dr. Monica Bertagnolli, director of the National Institutes of Health.

Columbia had already canceled in-person classes. More than 200 pro-Palestinian demonstrators who had camped out on Columbia’s green or occupied an academic building were arrested in recent weeks.

Similar encampments sprouted up elsewhere as universities struggled with where to draw the line between allowing free expression while maintaining safe and inclusive campuses.

The University of Southern California earlier canceled its main graduation ceremony. Students abandoned their camp at USC on Sunday after being surrounded by police and threatened with arrest.

Other universities have held graduation ceremonies with beefed-up security. The University of Michigan’s ceremony was interrupted by chanting a few times Saturday. In Boston on Sunday, some students waved small Palestinian or Israeli flags at Northeastern University’s commencement in Fenway Park.