Study reveals ease with which young people access guns 2:32
(CNN) -
Two students and an adult suffered non-life-threatening injuries during a shooting at Rigby High School in Rigby, Idaho, on Thursday, according to a school district statement obtained by CNN affiliate East Idaho News. .
The suspect, a sixth-grade student, pulled a pistol from her backpack and began firing in a hallway before heading outside, Jefferson County Sheriff Steve Anderson said.
A teacher was able to take the gun from the student, ending the shooting, Anderson said.
"During the shooting, a teacher disarmed the student and held her until the police apprehended her," Anderson told a news conference Thursday afternoon.
The suspect is in custody, he said.
The students were evacuated to a nearby high school where parents were asked to pick them up, according to a statement from the Jefferson County School District.
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"This is the worst nightmare a school system can face," said District Superintendent Chad Martin.
Officials have found no motive for the shooting in Rigby, a small town north of Idaho Falls.
Jefferson County Prosecutor Mark Taylor said that once the investigation is complete, his office "will file the appropriate charges, possibly including three counts of attempted murder."
The two injured students will remain in the hospital overnight, according to Eastern Idaho Medical Center's Dr. Michael Lemon.
The adult has been discharged from the hospital.
All schools will be closed Friday in response to the shooting, the school district said Thursday afternoon, but counselors will be available at Rigby Middle School throughout the day.
Idaho Governor Brad Little said he was being updated on the situation and was praying for "those involved in today's tragic events."
"Thank you to our law enforcement agencies and school leaders for their efforts to respond to the incident," Little said in a Facebook post.
CNN's Paul P. Murphy and Sara Finch contributed to this report.