Police officials in Arapahoe County, Colorado have confirmed that there has been a shooting at Arapahoe High School, and that the shooter is believed to still be at large inside the building.
Sheriff Grayson Robinson said that there are at least two confirmed victims at Arapahoe High School, located about 10 miles south from downtown Denver. The school is home to more than 2,000 students.
Arapahoe is part of the Littleton Public School district, which neighbors the Jefferson County School District, home to Columbine High School.
Details are still trickling in, be sure to check back for additional coverage.
3:40 PM EST: Police have begun slowly evacuating students from Arapahoe High School, suggesting that the situation is no longer active.
3:48 PM EST: Law enforcement officials spoke with NBC News’ Pete Williams, telling him a suspect is injured:
BREAKING: Danger appears to be over at Arapahoe HS in Centennial, CO, law enforcement officials tell @PeteWilliamsNBC; suspect wounded
— NBC Nightly News (@nbcnightlynews) December 13, 2013
3:54 PM EST: According to a police official, the lone suspect, a student at Arapahoe, is dead from a self-inflicted gunshot wound. The individual entered the school armed with a shotgun and was searching for a specific teacher, according to Sheriff Robinson. Another student confronted the gunman and was shot. He is currently in serious condition at a nearby hospital. A second student suffered a minor injury and is being treated as well.
4:06 PM EST: Though the danger appears to be over, students are still being told to shelter in place as police officers slowly clear each classroom one by one inside the school. One parent spoke with ABC 7 and said that her daughter is still inside a classroom that has yet to be cleared. Again, there is no longer any threat to the safety of students or staff.