HUNTSVILLE, Ala. – Three people were killed and several more injured in a shooting Friday in a science building at the University of Alabama's Huntsville campus, university officials said.

A woman was in custody, but university spokesman Ray Garner said he could not identify her or the victims. Local television stations reported she is a faculty member.

Trent Willis, chief of staff for Huntsville Mayor Tommy Battle, said several other people had been shot in addition to the four Garner reported, but he did not have an exact number or their conditions.

Huntsville Hospital spokesman Burr Ingram said the hospital was treating three victims. Two were in critical condition and one was in stable condition. It was not clear if the three included the one injured person university officials announced.