Two people were killed and four people were injured in a shooting at the University of North Carolina, Charlotte on April 30.

The shooting took place on the last day of classes and prompted faculty to announce a campus-wide lockdown until the shooter was apprehended by police.

Officers who were stationed on the scene for a campus concert rushed the suspect and arrested him after being alerted to the shooting happening in a nearby classroom building.

“Our officers’ actions definitely saved lives,” said Campus Police Chief Jeff Baker at a news conference.

A UNCC professor, Susan Harden was at home during the time of the shooting but headed to campus once she heard the news to volunteer at a staging area. Harden knew the location of the shooting well, as she had taught in that building before.

“It breaks my heart. We’re torn up about what’s happened,” Harden said. “Students should be able to learn in peace and in safety and professors ought to be able to do their jobs in safety.”