On the first day of Black History Month this week, there were a string of bomb threats made targeting historically Black colleges and universities in the U.S. The FBI announced today that it would be looking into those threats and investigating them as “racially or ethnically motivated violent extremism and hate crimes.”

“This investigation is of the highest priority for the bureau and involves more than 20 FBI field offices across the country,” the FBI said in a statement, noting the probe was “of the highest priority for the bureau.”