Federal prosecutors have charged two charter bus drivers with reckless endangerment for driving a group of seventh graders on a Yellowstone National Park field trip while under the influence of alcohol.

U.S. Attorney's Office spokesman John Powell says Kevin Stark and Jack Parrent made an initial court appearance Monday before U.S. Magistrate Judge Stephen Cole in Mammoth Hot Springs.

Jerry Perkins, owner of the Bozeman-based bus company Karst Stage, says the drivers were arrested Friday by park rangers.

The men have been charged with reckless endangerment and knowingly operating a vehicle while on duty with a detectable amount of alcohol.

The 42-year-old Stark was also charged with recklessly creating a public jeopardy.

The 44-year-old Parrent was charged with driving with a blood-alcohol content of over .08.

Story from The Assocaited Press