7:15 a.m.: A 911 emergency call to Virginia Tech Police reports a shooting at West Ambler Johnston Hall, leaving two people dead.
8:00 a.m.: Classes begin.
9:00 a.m. – 9:30 a.m.(approx.): Shooter opens fire in classroom in Norris Hall, an engineering building.
9:26 a.m.: Emails go out to campus staff and faculty saying there has been a shooting on campus.
9:30 a.m.: Students in the engineering building Norris Hall call police to report more shots have been fired.
9:50 a.m.: A third email announcing: "A gunman is loose on campus. Stay in buildings until further notice. Stay away from all windows" is sent to all Virginia Tech email addresses. Loudspeakers broadcast a similar message.
10:52 a.m.: A fourth email warns of a multiple shooting with multiple victims in Norris Hall, saying the gunman has been arrested and that police are hunting for a possible second shooter. The entrances to the campus buildings are locked.
12:00 p.m.: At a press conference, authorities said there may have been more than 21 people killed and 28 injured.
2:30 p.m.: AP reports at least 31 killed, including gunman.
3:40 p.m.: Virginia Tech confirms 22 dead.
4:01 p.m.: President Bush speaks from the White House regarding the shooting.
4:40 p.m.: The school holds a press conference with updates on the day's events.
4:42 p.m.: Virginia Tech confirms 33 dead including the shooter.
7:30 p.m.: Third press conference.
7:30 p.m.: A final confirmation that there have been 31 deaths at Norris Hall, including the gunman.