Authorities are investigating a bus crash that occurred at the Denver International Airport on Sunday, claiming the life of the driver.

Authorities are investigating a bus crash that occurred at the Denver International Airport on Sunday, claiming the life of the driver, reports USA Today. 
The vehicle was one of three transporting members and staff of the Legacy High School football team, which had just returned from a game in California. 
According to the Denver Post, as the bus was leaving the airport, it, for reasons unknown, headed back towards the facility. 
Soon after, the vehicle veered off a road and into a large concrete pillar, notes KMGH. 
Of the roughly 28 on board, as many as 20 were taken to area hospitals.
Two individuals were listed in critical condition and 2 in serious condition. 
According to a tweet by the school district, 15 students sustained injuries of a non-life threatening nature.