A Nevada middle school student shot and killed a teacher and wounded two students Monday before fatally shooting himself, Sparks police said.
Police said the teacher died trying to protect students.
"We've got video we have to review, people we've got to talk to," said Tom Robinson, deputy chief of Reno police, which also responded. "But in my estimation, he is a hero. We do know he was trying to intervene."
The Reno Gazette-Journal said the victim was a popular math teacher at Sparks Middle School but said it was withholding his name until it was made public by police.
Angela Rambo, spokeswoman for Renown Regional Hospital, said the hospital had received two male patients, both minors and both in critical condition. Their conditions later were upgraded, one to fair condition, the other to serious condition.
Eighth-grader Kyle Nucum, 13, said he was on an outside basketball court when the shooting happened.
"We heard a pop, like a loud pop, and everybody was screaming and the teacher came to investigate," Nucum said. "I thought it was a firecracker at first, but the student was pointing a gun at the teacher. After the teacher told him to put it down, and the student fired a shot... the teacher fell and everybody ran away.
Nucum said he and other students heard four or five more shots as they ran across a field, where a woman let them into her home.
Student Michelle Hernandez said she saw the shooter Monday morning. "I heard him saying, 'Why you people making fun of me, why you laughing at me,'" Hernandez said.
Eighth-grader Seth Hinchberger said the shooter "pulled out a weapon and just shot it. And scared all of us and we just started running."
Hinchberger said they ran into a hall and created a pile, "guys in the front … for the safety of the girls." He said the shooter came over and appeared to aim at the pile, but was distracted by a teacher and started shooting in another direction.
Sparks Middle School, in a working-class section of the city of 90,000, has about 700 students in the 7th and 8th grades.
"This is just a very sad day for us, a very tragic day," said Pedro Martinez, the superintendent of the Washoe County School District.
Sparks Mayor Geno Martini praised the emergency response during a press conference Monday.
"The city itself is very safe, this is just an isolated incident," Martini said. "It's very, very tragic, I'm sadden to have to be here."
Nevada Gov. Brian Sandoval issued a statement:
"I was deeply saddened to learn of the horrific shooting at Sparks Middle School this morning. My administration is receiving regular updates and the Nevada Highway Patrol is assisting at the scene. Kathleen and I extend our thoughts and prayers to the victims and those affected by these tragic events."
Sen. Harry Reid, D-Nev., also released this statement expressing condolences to the victims, their families and everyone at the school.