BLACKSBURG (AP) -- A shooting at Virginia Tech this morning at a campus dormitory left at least one person dead, and police were trying to catch the shooter. Virginia Tech officials canceled classes for the day and are warning the university community on the school's Web site that there is a "gunman on the loose" and that students, faculty and staff should stay inside and stay away from windows. A state government official with knowledge of the incident told The Associated Press that at least one person was killed by the shooter and another was wounded. School officials say the shooting happened earlier this morning at West Ambler Johnston Hall, one of the largest dorms on campus. It houses nearly 900 students. Police were trying to capture the gunman. Officials ordered the 2600-acre campus closed and no one will be allowed on campus. Nineteen-year-old student Jason Anthony Smith of Culpeper lives in the dorm, known as "West A-J." He told The Associated Press, "There's just a lot of commotion. It's hard to tell exactly what's going on." Smith says police are yelling at students to stay inside. The shooting incident was the second at the school in less than one year. Last August, the opening day of classes was canceled and the campus closed when an escaped jail inmate allegedly killed a hospital guard and a sheriff's deputy involved in a massive manhunt.