In Colorado, an 18-year-old student was killed and eight were injured on Tuesday in a school shooting at the STEM School Highlands Ranch south of Denver. Authorities have taken two students into custody. Douglas County Sheriff Tony Spurlock spoke to reporters outside the school.

Sheriff Tony Spurlock: “Two individuals walked into the STEM school, got deep inside the school and engaged students in two separate locations. … We do have eight students that are in area hospitals right now. Several of them are in critical condition. … Both of the suspects, we believe, are students of the STEM school.”

Reporter: “Are they among the injured?”

Sheriff Tony Spurlock: “They are not injured.”

The STEM School Highlands Ranch is located just seven miles from Columbine High School, where 12 students and a teacher were shot dead 20 years ago, on April 20, 1999. The school is also about 20 miles from Aurora, Colorado, where a gunman killed 20 people at a movie theater in 2012. Tuesday’s shooting in Colorado came a week after two students were killed and four were injured in a mass shooting at the University of North Carolina at Charlotte.