Second day of bomb threats against multiple historically Black colleges and universities

For the second day in a row, several historically black colleges and universities received bomb threats Tuesday, resulting in shelters-in-place and canceled classes as authorities swept campuses looking for devices. No explosions have been reported.

Howard University, in Washington, D.C. was among schools threatened on both days. It declared an all-clear Tuesday as it did Monday.

CBS Washington, D.C. affiliate WUSA-TV reports a bomb threat was also reported at the University of the District of Columbia (UDC) Tuesday.