An altercation between a man and a woman on the Virginia Tech campus in Blacksburg, Virginia turned deadly Wednesday night.
Witnesses say the two were arguing at the school's graduate life center when the man pulled a knife and stabbed the woman to death.
Police responded to the scene and took the suspect into custody. They also retrieved a knife believed to be the murder weapon.
The incident triggered the school's alert system which told students through text and e-mail messages to stay in place. About an hour later, another message was sent telling them to resume normal activity. The attack is under investigation.
The school's alert system was revamped following the shooting deaths of 32 people at the school by a deranged man on April 16, 2007. That attack is considered the deadliest mass shooting by a single gunman in U.S. History.