SALISBURY, Md. (AP) — Officials at a Maryland university canceled classes for a day after graffiti threatening black students with lynching was discovered scrawled in academic buildings. News outlets report that the FBI has joined the investigation after two messages were found Wednesday at Salisbury University. University President Charles A. Wight said he canceled Thursday’s classes to give the campus community “the opportunity to come together to process” what happened, support each other and figure out how to move forward. Classes were set to resume Friday. It was the second time in three months that such graffiti had been found at the school.