Watch Arapahoe High School Shooting Live Coverage: Gunman Dead, 1 Student Seriously Injured In Colorado [VIDEO]

At least two people have been injured at Arapahoe High School in Centennial, Colorado when a gunman walked into the school. The gunman, a student at the high school, is believed to have been targeting teacher. Students could be seen heading out of the school with their hands above their heads, letting officers know they were unarmed. Police were patting down students on the track and field grounds outside the building. At least one student has been hospitalized in serious condition. Reports are now saying the suspect took his own life.

Arapahoe Country Sheriff Grayson Robinson spoke with reporters saying the shooting happened around 12:30pm mountain time. The unidentified student was looking for one of his teachers, though it is unclear why the educator was being targeted. The teacher was able to get out of the school safely with the rest of the student body and faculty. "We are slowly and methodically clearing the school to make sure the students are safe," Grayson told the media. "No weapons were found other than the one that was used in the shooting." The teen was armed with a shotgun.

One of the shooting victims is believed to be 15 or 16 years old and has been taken to Littleton Hospital with a gunshot wound. The identity of the other victim has not been released nor the extent of his or her condition. Arapahoe High School has a student population of 2,000 and is described as located in an "affluent Denver suburb." The school is located eight-miles away from Columbine High School when two troubled students killed 12 of their fellow classmates and a teacher in 1999.

Parents of Arapahoe High School students were asked to wait at a nearby church in order to collect their children. The school is located in the same county where James Eagan Holms is accused of shooting a killing 12 people in an Aurora movie theater during a screening of "Batman" last year. The shooting also comes one year after the Newtown Conn. Shooting in which 26 people, 20 children no older than six and six adults were killed by a loan gunman. Dec. 14 marks the one-year anniversary of the mass killing.