The publication reports that the school is still in the process of being evacuated.
The school has about 1,850 students in Kindergarten through to 12th grade.
According to a Douglas County Sheriff’s Office tweet, the report of shots fired came at about 1.53 pm (US time).
The Denver Post has reported that officers were on the scene immediately and a struggle broke out between them and the two suspects.
Parents were kept outside the school and in alphabetical order so that that their children could be brought to them, The Denver Post reports.
This is a developing story.