For the second time this month, at least seven historically black universities and colleges have received bomb threats.

Howard University, Bowie State University, Bethune-Cookman University, Southern University, Delaware State University, Judson Bible College and Albany State University have all reported potential threats Monday.

The U.S. Federal Bureau of Investigation is aware of the series of bomb threats and is working with law enforcement to address potential threats.

“As always, we would like to remind members of the public that if they observe anything suspicious to report it to law enforcement immediately,” the FBI said in a statement to ABC News.

The acting deputy director of the Bureau of Alcohol, Tobacco, Firearms & Explosives, Thomas Chittum, also said that agents from the bureau are responding to the reports.

“We can confirm that ATF has responded,” Chittum told reporters on a call Monday. “Of course, it is a federal crime to use interstate facilities to make a bomb threat, and so ATF will provide our investigative expertise and support to that investigation, but obviously, the facts are preliminary and unfolding.”

Albany State University in Georgia received notice of a bomb threat to the academic buildings of its campus. As local law enforcement officials investigate, all ASU campuses remained closed and employees and students were told not to report to campus.

Bowie State University in Maryland is also investigating a bomb threat with bomb technicians from the Maryland State Fire Marshal. The campus remains closed as K9s conduct sweeps of university buildings.

“OSFM Bomb Technicians and explosive detection K9s are assisting @BowieState PD with a telephonic bomb threat,” a tweet from the agency read. “Maryland State Police are on the scene. The investigation is active. Prince George’s County Police Department is also on the scene.”

Southern University and A&M College also received a bomb threat Monday and went into lockdown. The university told students classes were canceled and that they should remain in their dorm rooms until an all-clear was issued.

Delaware State University told ABC News that University Police are investigating and that employees and commuter students have been instructed not to report to the campus until further notice. Residential students have also been asked to remain in their dorm rooms.

Howard University and Bethune-Cookman University also report potential bomb threats to their campuses, according to ABC-affiliate ABC7 News.

On Jan. 4, at least seven historically Black colleges and universities received bomb threats, according to school officials.

However, no bombs were found on the campuses of Florida Memorial University, North Carolina Central University, Prairie View A&M University, The University of Arkansas at Pine Bluff, Florida Memorial University, Norfolk State University and Xavier University of Louisiana.

The threats forced campuses to lockdown or evacuate and local law enforcement was alerted.

ABC News’ Luke Barr contributed to this report.