At least three were reported injured after a sixth grade girl opened fire at an Idaho middle school on Thursday. The tragic incident happened in Rigby Middle School about 95 miles from the Yellowstone National Park, Associated Press reported.

The motive for the sudden shooting is yet to be identified by the authorities, and it is still not clear how the female sixth grader got her handgun in the first place. Moreover, the name of the suspect was not given by the officials, but County Sheriff Steve Anderson disclosed that the female sixth grader is from a nearby city of Idaho Falls.

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3 Hurt After the Open Fire

ABC News reported that an adult and two students were hurt during the tragic incident. The victims were transported to Eastern Idaho Regional Medical Center for treatment. The adult was reported to be released after the treatment.

Meanwhile, hospital officials noted that the two students needed to stay in the hospital overnight. Officials pointed out that the three victims had non-life-threatening injuries, but one of the students may require surgery.

Meanwhile, Idaho Governor Brad Little expresses his sympathies to the tragic incident that endangered the lives of middle school students.

"I am praying for the lives and safety of those involved in today's tragic events," said Little in his tweet.

Trauma Medical Director Michael Lemon from Eastern Idaho Regional Medical Center noted that the injured adult was released after the bullet that went through the limb was removed. Lemon furthered that one of the students had wounds in two limbs, pointing out that the victim might be shot twice.

The identity of the victims was also not released by the authorities.

"Today, we had the worst nightmare," said Jefferson School District Superintendent Chad Martin adding that the incident is the worst scenario a middle school could encounter.

After the tragic incident, students from Rigby Middle School were evacuated to Rigby High School, the place where parents would pick them up, East Idaho News reported. National Education Statistics confirmed that Rigby Middle School has about 1,500 students through eighth grades.

Sixth Grade Girl Opens Fire in Rigby Middle School

The Sheriff's Office noted that just after 9 in the morning, the sixth grader pulled out a handgun from her backpack and began firing in the hallway. Two people were hit. The suspect then moved outside, where another person was shot.

"Me and my classmates were just in class with our teacher," a 12-year-old student told Associated Press, adding that his teacher went to check it out and found blood.

A teacher disarmed the sixth grader and held her until the officials arrived at the scene.

Moreover, the District Superintendent noted that schools would be closed district-wide to give students time with their families.

Mark Taylor, Jefferson County prosecuting attorney, noted that appropriate charges will be filed once the investigation of the incident in the Idaho middle school is finished. Taylor also noted that the sixth grade girl can be charged with three counts of murder.

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WATCH: Sheriff: Girl shoots 3 at Idaho school; teacher disarms her - from WFRV Local 5