HERO pupils disarmed two teenagers who stormed a US school last night and opened fire killing one student with a gun hidden inside a guitar case.

Another seven people were left injured before armed cops rushed to the STEM School Highlands Ranch at around 1:50pm local time on Tuesday.

They were met by what was described as an "active and unstable scene" amid fears that as many as three gunmen were on the shooting rampage.

An 18-year-old male student was killed and at least seven other pupils aged as young as 15 were hurt.

Police named one of the suspected shooters as 18-year-old Devon Erickson - while the other suspect has not been named as they are under-18.
Erickson's social media pages indicate that he is an avid guitar player, youth theatre actor and a registered Democrat.
Past posts on his sites have criticised President Donald Trump and Christianity for its treatment of homosexuality.

The Denver Channel said sources told it that the motive of the alleged shooters went beyond bullying and involved revenge and anger towards their classmates.

Police were seen entering a home in Highland Springs believed to be owned by Erickson's parents.

A car spray painted with the words "f*** society" was towed away from the house hours after the shooting, according to reports.

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