OBERLIN, Ohio (AP) — Oberlin College in Ohio says it canceled classes after a report that a person wearing a hooded robe resembling Ku Klux Klan gear was seen near an African heritage building.

The college near Cleveland canceled Monday’s classes after the early morning sighting. It calls it the latest in a series of hate-related incidents on campus. Racist graffiti were reported on campus last month.

President Marvin Krislov and three college deans told the campus community in an open letter that they hope the ordeal will lead to a stronger Oberlin. The college invited students and professors to Monday afternoon events focused on mutual respect.

The famous liberal college prides itself as a stop on the Underground Railroad that helped fugitive slaves.