STUDENTS INJURED IN HOMECOMING SHOOTING.

LINSEY DAVIS (ABC NEWS) (Off-camera) Perry, thank you. Authorities in Alabama are appealing to the public for help as they try to determine who's responsible for a deadly mass shooting at Tuskegee University. At least one person was killed, more than a dozen were injured. It happened during a celebration of the school's 100th homecoming. And a warning, the video you're about to see does show the gunfire ringing out. The latest now from ABC's Faith Abubey. [ABSTRACT FROM PUBLISHER]