Protests over the Israel-Hamas war have spread across U.S. university and college campuses in recent weeks, leading to disruptions and arrests. Some demonstrations extended into weekend graduation celebrations, although they were muted in comparison to the encampments and rallies that have roiled campuses and resulted in nearly 2,900 arrests of students and other protesters.

Most of the commencement exercises took place as scheduled and remained largely peaceful. Here is a look at some of the ceremonies that included protests:

DUKE UNIVERSITY

Dozens of the 7,000 graduates at Duke University left their seats to protest pro-Israel speaker and comedian Jerry Seinfeld during the commencement in Durham, North Carolina, on Sunday.

Some waved the red, green, black and white Palestinian flag and chanted “Free Palestine” amid a mix of boos and cheers.

Seinfeld, whose decade-long namesake show became one of the most popular in U.S. television history, was there to receive an honorary doctorate from the university.