Acoording to reports two people have been shot and a shooter may still be inside a high school in suburban Denver, according to multiple Denver news outlets.

Police and emergency vehicles are reportedly racing to Arapahoe High School in Centennial, about 15 miles south of Denver. The high school is in the Littleton School District, where Columbine High School is located. The school is currently in lockdown.

The suspected gunman reportedly killed himself and one person reportedly is in critical condition after being shot.

This coming one day before the one year anniversary on the school shooting in Newtown Ct.