Just caught this report of a janitor reporting that a couple of armed individuals with backpacks had broken into the school.
Swat was called to the school with the bomb squad
SWAT team sent to Denver school after armed men break in: cops
Police surrounded a Denver school early Tuesday amid reports two armed men with backpacks were inside.
A SWAT team was on the scene at the Noel Middle School in the northeast of the city, Denver Police Department said on its Twitter feed. read more>>>
There are a couple of backlinks in the above NBC News report along with a couple of tweets.
One leads you to a Denver Post reporter Ryan Parker who's posting up a few pictures and a running report on what's happening.
It looks like they've arrested whoever it is and are searching the school, possibly searching other schools as well.