BOSTON (AP) — Hundreds of students at Boston College have walked out of their classes to protest recent instances of racism on campus, including two posters that were defaced to say "Black Lives don't Matter."

Video footage shows the students filing onto a campus lawn around midday Wednesday and chanting, "Black lives matter."

The group Eradicate Boston College Racism organized the walkout and says the college failed to respond to racist and hateful incidents on campus.

Two signs were found defaced in a residence hall last weekend to say "Black Lives don't Matter." A racist social media post also circulated around campus.

Administrators say the college "condemns all acts of hate."

Organizers say the private Roman Catholic school teaches its students "not to be silent in times of injustices" and to fight against oppression.