Virginia Tech Timeline

From Channel Four (UK):

Monday April 16

7.15am - Virginia Tech Police Department receives an emergency call to go to a dormitory room at West Ambler Johnston Residence Hall at the Virginia Tech University.

Officers and members of the Virginia Tech rescue squad arrive to find two people, a man and a woman, have been shot dead in a dormitory.

The hall is closed off, students are asked to remain in their rooms and police begin collecting evidence and identifying witnesses.

The university authorities believe the deaths are "an isolated incident, domestic in nature."

7.30am - Officers begin following leads about a "person of interest" regarding the double murder.

8.25am - The Virginia Tech Leadership Team, including the University president, meet to assess the situation and to decide how to notify students of what has happened.

9am - The Leadership Team is briefed by Virginia Tech police chief Wendell Flinchum on the ongoing investigation.

9.26am - All university staff and students are sent an email informing them of the murders and asking them to report any suspicious activity. An emergency recording and a telephone message are also transmitted.

9.45am - The police receive a second emergency call to go to Norris Hall, an engineering building containing faculty offices, classrooms and laboratories.

Officers arrive to find the front doors chained shut from the inside. They break down the barricades and hear gunshots as they enter the building.

They follow the sounds to the second floor. As they reach it, the gunshots stop. Officers then discover the gunman, who has taken his own life.

9.55am - Staff and students are notified by email again about the second shootings.