( CNN ) -- Three faculty members were killed and three other school employees were wounded Friday in a shooting at the University of Alabama in Huntsville , a school spokesman said . A female shooting suspect was in custody and a second person was detained , `` not arrested , '' spokesman Ray Garner told reporters . Huntsville Police Chief Henry Reyes left open the possibility that more than one person had been detained . `` We have a suspect and possible persons of interest , '' he said late Friday . `` Until we go through everything , we 're not going to say exactly how many or who we have . '' He said police were questioning the suspect , whom he would not identify . Of the wounded , two were faculty members and the third was a staff member , he said . Garner said the incident occurred shortly before 4 p.m. in Shelby Hall . Police arrived at 4:01 p.m. ; residence halls were locked down at 4:10 p.m. ; the building was secured by 5:45 p.m. , he said . The suspect was taken into custody outside the building , said Reyes . No weapon has been recovered , he said . The 6-year-old , $ 60 million facility houses the chemistry department and is named for U.S. Sen. Richard Shelby of Alabama and his wife , Annette Shelby . Garner identified the dead as Gopi Podila , chairman of the biological sciences department ; Maria Davis , associate professor of biology ; and Adriel Johnson , associate professor of biology . He identified the injured as Joseph Leahy , associate professor of biology , in critical condition ; Luis Cruz-Vera , assistant professor of biology , in stable condition ; and Stephanie Monticello , staff assistant , also in stable condition . The wounded were taken to Huntsville Hospital . Classes and athletic events are to be canceled February 15-19 , he said . Asked why students had not been alerted for more than an hour after the shootings , Reyes said , `` I ca n't comment on that part . ''
Three killed were faculty members at University of Alabama in Huntsville . - A fourth person was injured when a car struck the group on I-65 near Birmingham. Shooting occurred about 4 p.m. in Shelby Hall , which is named for senator .