Police in Washington cleared out a pro-Palestinian encampment protest at George Washington University early Wednesday, arresting 33 people, authorities said.

Arrests were made for assault on a police officer and unlawful entry, the District of Columbia's Metropolitan Police Department said.

Police started to shut down the tent encampment after dozens of protesters marched to GWU President Ellen Granberg's home Tuesday night. Demonstrators carried signs that read "Free Palestine" and "Hands off Rafah." Police were called, but no arrests were made then.

Rafah, Gaza’s southernmost city, is where much of the territory’s population has clustered. The area is also a corridor for bringing humanitarian aid into the Palestinian territory.

Israel seized the Gaza side of the Rafah crossing on Tuesday, while shutting off the nearby Kerem Shalom crossing, drawing criticism from humanitarian groups. Israel said Wednesday it had reopened Kerem Shalom.

GWU officials warned students that they could be suspended for engaging in protests at the school’s University Yard, an outdoor spot on the campus.

"While the university is committed to protecting students' rights to free expression, the encampment had evolved into an unlawful activity, with participants in direct violation of multiple university policies and city regulations," a GWU statement said.

Event organizers said police used pepper spray to contain the crowd of protesters on Wednesday.

Police said they dispersed demonstrators because "there has been a gradual escalation in the volatility of the protest."

A congressional committee canceled a hearing on the university encampment Wednesday. District of Columbia Mayor Muriel Bowser and Metropolitan Police Chief Pamela Smith had been scheduled to testify about the city’s handling of the protest before the House Committee on Oversight and Accountability.

More than 2,600 people have been arrested on 50 campuses in pro-Palestinian demonstrations, according to The Associated Press.

The nationwide campus protests started in response to Israel's offensive in Gaza that began after Hamas launched an attack on Israel on October 7, killing some 1,200 people and taking roughly 250 hostages.

More than 34,000 Palestinians have been killed in Israel's offensive, according to the Health Ministry in Hamas-run Gaza. Israel warned it could "deepen" its operation in Rafah if cease-fire talks fail to secure the release of the hostages.

Some information for this report was provided by The Associated Press.