Virginia Tech locked down its campus for five hours and canceled classes Thursday after three teens reported seeing a possible gunman outside a dining hall.
A university police dispatcher issued the lockdown alert at 9:38 a.m. via the school's website as well as email and text-message notifications, which all "worked without a hitch," said university spokesman Larry Hincker.
Tech issued updates throughout the day with its alert system and released a sketch of the possible gunman at 12:44 p.m. Summer school classes were canceled at 1 p.m.
Officers from eight local, state and federal agencies searched the 2,600-acre campus and questioned several people, but none was deemed a suspect. The alert was lifted at 2:41 p.m. after officers had not received or discovered any additional information beyond the initial report.