From: KRISTIN M. HALL, Associated Press Writer HUNTSVILLE, Ala. A woman opened fire during a biology faculty meeting at the University of Alabama's Huntsville campus Friday, killing three people and injuring three others, officials said. The shooter was caught outside the Shelby Center, a science building, without incident, according to university spokesman Ray Garner. Local media reported the shooter was a faculty member, though Garner said he could not identify her. A man was also being detained. All three of those killed and two of the injured were faculty members. The third injured person was a staff member. No students were involved in the shooting. Huntsville Hospital spokesman Burr Ingram said two of the injured were in critical condition and the third was in stable condition. Nick Lawton, the son of a biology professor at the school, said his father was not among the victims, but he did not know much more. Lawton, 25, was exercising when a friend phoned him to tell him about the shooting. He called his father, Robert Lawton, and found out that he was not hurt, then he let rest of his family know. "All I know is that my father is OK," Nick Lawton told The Associated Press. Sophomore Erin Johnson told The Huntsville Times a biology faculty meeting was under way when she heard screams coming from a conference room. University police secured the building and students were cleared from it. There was still a heavy police presence on campus Friday night, with police tape cordoning off the main entrance to the university. The Huntsville campus has about 7,500 students in northern Alabama, not far from the Tennessee line. The university is known for its scientific and engineering programs and often works closely with NASA. The space agency has a research center on the school's campus, where many scientists and engineers from NASA's Marshall Space Flight Center perform Earth and space science research and development. The university posted a message on its Web site Friday afternoon telling students the campus was closed Friday night and all students were encouraged to go home. Counselors were available to speak with students. It's the second shooting in a week on an area campus. Last Friday, a 14-year-old student was killed in a middle school hallway in nearby Madison, allegedly by a fellow student. "This town is unaccustomed to shootings and multiple deaths," Garner said.