Crews repairing sidewalks on the University of Alabama campus discovered a stash of Civil War-era cannonballs.

University spokeswoman Cathy Andreen tells al.com (http://bit.ly/1I5uyYp ) explosive ordinance disposal technicians were called to the campus Friday afternoon to guarantee the safety of everyone on campus after the 10 cannonballs were found buried in the ground.

The cannonballs were found under a sidewalk near the Gorgas Library in the middle of campus. Because they were found late Friday afternoon, employees in the immediate area were allowed to leave and go home.