Update 2:27 p.m.: A student at a Nevada middle school opened fire on campus, killing a staff member who was trying to protect other children, police said Monday.
The suspected gunman was also dead, and authorities say no shots were fired by law enforcement.
Two other students were critically injured in the violence that erupted around 7:15 a.m., shortly before classes began Monday. One is out of surgery and the other is doing well, according to police.
Police said between 150 and 200 officers responded to the shooting.
Students from the middle school and next door elementary school were evacuated to the nearby high school, and classes were canceled.
12:37 p.m.: Police say two people are dead and two more are injured in a shooting at Sparks Middle School in northern Nevada Monday morning.
Washoe County School District Police didn't immediately offer details of the identities of the dead. They said the school is "all clear" and the suspect is "down," but offered no further details.
Spokeswoman Angela Rambo of Renown Regional Medical Center says two boys are in critical condition.
Washoe County School District spokesman Charles Rahn says the middle school and next door Agnes Risley Elementary School have been evacuated to Sparks High School. Rahn said the middle and elementary schools will be closed Monday.
Sparks is a city just east of Reno.
This segment aired on October 21, 2013.