COLORADO SPRINGS, Colo. -- Colorado Springs School District 11 is testing a school bus this year that is powered by propane.

District officials say they will evaluate its performance, reliability and fiscal viability as a potential alternative to school buses that run on gasoline and diesel.

Colorado Springs television station KKTV reports students from Wasson High School, Galileo School of Math and Science and Scott Elementary School were the first to ride the bus Monday.

The district says it has entered a lease-to-buy agreement for the bus. Financial terms of the agreement weren't immediately available.

District officials say the propane-powered bus has few emissions, and the fuel is less expensive than gasoline.