Two wounded, gunman dead in shooting at high school near Denver..

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 on the scene at Arapahoe High School in Centennial, about 15 miles south of Denver. Hundreds of students are being evacuated from the school.

The high school is in the Littleton School District, and only a few miles from the scene of previous mass shootings at the Aurora movie theater in 2012 and Columbine High School in 1999.

Denver Post reporter Ryan Parker says witnesses at the scene tell him that a student shot at least two students in the school cafeteria about 1 p.m. MT. Parker tweeted that Adam Jones, whose sister goes to high school, said students are still locked in rooms, and "very scared."