The school district said the students involved are being monitored and evaluated by Legacy High School's athletic trainer. The Post reported that five patients in fair condition were treated at Children's Hospital Colorado.
Two of those taken to hospital following the crash were in a critical condition, Denver Medical Centre told NBC News.
There is a reported crash involving a school bus at Swindell Road near N. Galloway Road in Lakeland.
As of late Sunday, authorities had not released any of the bus driver's medical history.
One mother said her son, who is a coach, was supposed to be on that bus, but opted to ride back to the school with friends.
Legacy High School is in Broomfield, a suburb north of Denver. More than a dozen students and coaches from Legacy's Junior Varsity (JV) football team made their escape through an emergency exit.
Uninjured students gathered with parents Sunday evening inside the airport as crash crews worked on the bus.
Police haven't released information on the cause of the crash.
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