A family member of a teacher killed in a shooting on the campus of Sparks Middle School in northern Nevada identified him as 45-year-old Michael Landsberry.
Landsberry was one of two people who died after gunfire rang out on the campus about 7:15 a.m. Monday, shortly before began. A student, who police said was the likely shooter, also died, while two other boys students were critically injured.
One was out of surgery and the other was doing well, according to police.
Police said the slain staff member was trying to protect other children. Authorities said no shots were fired by law enforcement.
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.
At the evacuation center, parents walked with their arms around their children, some of whom were in tears.
Police said the shooting happened on the school's campus, but outside the school building itself.
According to Landsberry's sister-in-law, the teacher was a military veteran.
Nevada Gov. Brian Sandoval said he was saddened to learn of the horrific shooting.
"My administration is receiving regular updates and the Nevada Highway Patrol is assisting at the scene," Sandoval said in a statement. "Kathleen and I extend our thoughts and prayers to the victims and those affected by these tragic events."
Sen. Harry Reid, D-NV, said he sends his condolences to the victims' families.
"No words of condolence could possible ease the pain, but I hope it is some small comfort that Nevada mourns with them," Reid said in a statement.
Rep. Dina Titus, D-District 1, called Monday a harrowing day for the state.
"My thoughts are with the victims' families and all those affected by this morning's tragic shooting at Sparks Middle School," Titus said in a statement.
Sen. Dean Heller, R-NV, also extended his condolences.
"Today's events at Sparks Middle School are unsettling and concerning," Heller said in a statement.
The school enrolls about 700 students in 7th and 8th grades.
Sparks is a city just east of Reno.
Copyright 2013 KVVU (KVVU Broadcasting Corporation). All rights reserved. The Associated Press contributed to this report.